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Topic	Applies To
Owner's Manuals	All Models
Unable to install / update driver on Windows 10 or Windows 11	All Versions
"Unable to format data." Error When Programming Box	V2.0 - V2.0.3
"Subscript out of range" Error When Printing A Report	V2.0 - V2.0.2
"Division by zero" Error When Printing A Report	V2.0 - V2.0.2
"Corrupted Access Code" Error	V2.0 - V2.0.1
Unable to edit Stop Date for an old Temporary User	V2.0 - V2.0.1
"Sync" or "Command response checksum bad" Error	V2.0
Downloading Software	All Versions
Installing On A 64-Bit Windows Systems	All Versions
Installing USB Drivers Under Windows 7 Or Later	All Versions
Communication Problems	All Versions
Using a USB port instead of a serial port with older Accessors	All Versions
Unable to add Users at the Box or use Master Code for Wall Release	All Versions
Repairs and Technical Support	All Versions

Owner's Manuals

Click here to download the Owner's Manual for the Accessor ACC4000+. Adobe Acrobat Reader required.

Note this manual is for the latest version of the Accessor. Earlier versions do not support all the features described in the manual, such as adding users at the box and removing the unit from the wall using a Master Code.

If you have trouble viewing the manual, try right clicking on the link to download the file and then double click on the file on your computer to open.

Unable to install / update drivers on Windows 10 or Windows 11

In Windows 10 / 11 a Vulnerable Driver Blocklist is enabled by default and can cause issues with Omniguard, Accessor and Mistral drivers.

With Admin privileges the driver block list can be disabled in Windows Security by opening "Windows Security" and selecting the "Device Security" tab.

Click on "Core isolation details" and then toggle off "Microsoft Vulnerable Driver Blocklist". If a prompt appears click "Yes" to approve. Visit the Accessor Software Downloads page to get the latest driver version.

"Unable to format data." Error When Programming Box

When attempting to program a box the error message "Unable to format data. Error # 5:Invalid Procedure Call or Arguement" appears.

This error occurs because the Location for the box is too long. When editing, it is limited to 50 characters but it must be 30 characters or less for programming. As a work around, select the Box in the File Pane and change its Location to something 30 characters or less in the Detail Pane.

This problem has been corrected in V2.0.4 software. Visit the Accessor Software Downloads page to get the latest version.

"Subscript out of range" Error When Printing A Report

When attempting to print users an error dialog box appears with the message "Error while printing user summary." or "Error while printing user details." and "Error # 9:Subscript out of range"

This error occurs when the password used to open the ACE file is not the Unrestricted Password. As a workaround set the column width for the Access Code column to minimum in the Detail Pane and don't choose "Include User Detail" in the Select Report To Print dialog. This will print users without their Access Codes. See Software Basics in the ACE online help for more information.

This problem has been corrected in V2.0.3 software. Visit the Accessor Software Downloads page to get the latest version.

"Division by zero" Error When Printing A Report

When attempting to print a report of Users In Group or Deleted Users, an error dialog box appears with the message "Error while printing user summary." or "Error while printing user details." and "Error #11:Division by zero"

This error occurs because there are no users in the group or no deleted users to print.

This problem has been corrected in V2.0.3 software. Visit the Accessor Software Downloads page to get the latest version.

"Corrupted Access Code" Error

When attempting to program a box, an error message appears saying one of the users has a corrupt Access Code. The user with the corrupt code can not be found in the file.

This error occurs because the ACE file is damaged. There is currently no work around.

This problem has been corrected in V2.0.2 software. Visit the Accessor Software Downloads page to get the latest version.

Unable to edit Stop Date for an old Temporary User

While attempting to edit the stop date for a temporary user whose start date has passed, you may get an error message and be unable to leave the stop date box. The only thing you can do is close the program by clicking on the "x" in the upper right corner.

This is an error in the date checking for temporary users. As a work around, open the file and edit the user by changing the start date first.

This problem has been corrected in V2.0.2 software. Visit the Accessor Software Downloads page to get the latest version.

"Sync" or "Command response checksum bad" Error

An error messge occurs when attempting to communicate with an Accessor or Palm Organizer. The error messages are "Sync response checksum bad. Check serial cable for a loose connection. Error 11" or "Command response checksum bad. Check serial cable for a loose connection. Error 902" respectively.

This error occurs on some computers with ACE V2.0. It is caused by a serial port returning invalid data while ACE is attempting to locate the Accessor or Palm Organizer.

As a work around, open the file "ACE.ini", located in the directory where ACE was installed, by double clicking on it. Change the number on the second line to 129 if you are using serial port 1 or 130 if you are using serial port 2. Save the file and close it. This should allow ACE to find the Accessor or Palm Organizer. If you are still experiencing problems, please contact Tech Support at 206-241-9395.

This problem has been corrected in V2.0.1 software. Visit the Accessor Software Downloads page to get the latest version.

Downloading Software

Click on the link for the file you want to download.
When your browser asks, choose "Save this file to disk" and click "OK".
Change the "Save As" location to the Desktop and click on "Save".
When the download is complete locate the file on your Desktop.
If you've downloaded a "zip" file, double click on it or use a zip utility to open it and run the "install.exe" program it contains. Files with the ".exe" extension can be run by double clicking on them.

Installing On A 64-Bit Windows Systems

If you see an error when installing or running the program indicating that you need to request a 64-bit version, right click on the program (not the shortcut but the actual program file), select Properties and enable compatibility mode in the Compatibility tab. If this is a new installation or if your USB equipped Accessor is not recognized by the software, you will need to download the drivers, unzip the file and run "dpinst64.exe".

Installing USB Drivers Under Windows 7 Or Later

If you are using Windows 7 Or Later and your USB equipped Accessor is not recognized when plugged in or gives you an error when the Accessor is connected, download and install the latest version of software from the Accessor Software Downloads page. If after installing the latest software you are still having trouble, download the drivers, unzip the file and run "dpinst64.exe" or "dpinst32.exe".

Communication Problems

All Accessors

Make sure you have the latest version of software, available on the Accessor Software Downloads page.
The ACE software can only detect Accessors on COM ports 1 through 16. If you attempting to communicate with an Accessor that has a USB port or you are using a USB to serial adapter to communicate with an older Accessor, the COM port number may be too high. To change the port used, open the "System" control panel, select the "Hardware" tab and click on "Device Manager". In the "Device Manager" open "Ports (COM & LPT)", double click "Accessor USB Serial Port (COMxx)", "Port Settings" tab, click "Advanced..." and change the "COM Port Number" to an unused COM port less than 17.

Accessors with USB Connectors

Verify that the drivers have installed properly. With the Accessor plugged into the USB port on your computer, open the "System" control panel, select the "Hardware" tab and click on "Device Manager". You should see "Accessor USB Serial Port (COMxx)" listed under "Ports (COM & LPT)". If you do not see this entry the drivers have not been installed properly. If you see an entry with a red "x" listed under "Universal Serial Bus controllers" try double clicking on that item and re-installing the driver, following the instructions in the help provided with the ACE software.

Accessors with Serial Connctors

Verify that the serial cable is connected to the computer and box.
If you are connecting to a serial port that was connected to a mouse, perform the following steps. Note this will deactivate your mouse so you will need another pointing device such as the track pad on a laptop or a PS/2 mouse.
- Windows 95 and 98
  - Right click on the "My Computer" icon on your desktop and select properties or open the "System" control panel.
  - Select the "Device Manager" tab.
  - Open the "Mouse" device entry by click on the "+" symbol beside it.
  - Double click on the serial mouse listed under "Mouse". There may be more than one mouse listed.
  - In the "General" tab for the mouse properties under "Device usage" check "Disable in this hardware profile".
  - Click "Ok".
  - Restart the computer.
- Windows NT
  - Open the "Devices" control panel.
  - Select the mouse from list.
  - Click the "Startup..." button.
  - Change the "Startup type" from "System" to "Disabled".
  - Click "Ok".
  - Restart the computer.
Your mouse should now be disabled. Run ACE again and select the correct serial port in the communication window. You will need to reverse the steps above to restore use of your mouse once you have finished with ACE.
If you just installed the software, it may not have loaded correctly. The most likely cause is that the installer was unable to load all the necessary files because some of them were in use or virus protection software was running. To correct the problem, perform the following.
- Remove any items in the Startup folder that may use the serial port by doing the following.
  - Right click on any open space on the Task Bar.
  - Select Properties from the pop-up menu.
  - Select the Start Menu Programs tab.
  - Click on Advanced button.
  - Click the "+" on Programs folder.
  - Click on the Startup folder.
  - Drag items from the folder on to the Desktop
  You will need to open the Startup folder again and replace the removed items after installation is complete.
- Restart the computer.
- Disable any virus protection software.
- If you are using Palm Desktop software for the Palm Connected Organizer, turn off HotSync.
- Install the ACE software again.

Using a USB port instead of a serial port

It is possible to communicate with older Accessors that have a serial port if your computer has only USB ports. You will need a USB to serial adapter. These are widely available from computer stores and online. See Communication Problems for information on setting the COM port number if you are having problems with your adapter.

Unable to add Users at the Box or use Master Code for Wall Release

Not all Accessor 4000 units support adding users at the box and use of a master code to release it from the wall. In order to perform these functions you must have an Accessor with serial number MS01246 - MS01399 or K4000 or greater. The serial number is located inside the unit and is viewable through the openning in the back cover. For Accessors that do not have these serial numbers, users cannot be added at the box and the unit can only be removed from the wall using the Wall Release code.

Repairs and Technical Support

If you need to send your Accessor in for repair you must get a Return Materials Authorization (RMA). You can fill out the RMA Request Form, call 206-241-9395 ext. 112 or email your complete contact information including address and phone number along with serial numbers of all units to be repaired to

If you have questions about your Accessor call tech support at 206-241-9395 ext. 112 or email

Engineering Solutions Inc. · Renton, WA · (206) 241-9395 · Fax (206) 241-9411