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Allegro Viewer will not start after upgrade

Chris DeWitt

I just upgraded from allegro_free_viewer_16-5 to allegro_free_viewer_16-6.  Right after the upgrade it worked fine but today I keep getting the message

This application has failed to start because callbackMgr.dll was not found.  Re-installing the application may fix this problem.

I uninstalled and reinstalled the viewer but same results. 

I did a regsvr32 "C:\Program Files\Cadence Design Systems\Allegro Free Physical Viewers 16.6\tools\pcb\bin\callbackMgr.dll" to register the dll but I get "Dll_Name was loaded, but the DllRegisterServer or DllUnregisterServer entry point was not found."

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  • Chris DeWitt
    The path is correct and points to the right version (16.6).  At one point I tried to re-register the dll and received the following.“C: \Program Files\Cadence Design Systems\Allegro Free Physical Viewers 16.6\tools\pcb\bin\callbackMgr.dll was loaded, but the
    DllRegisterServer entry point was not found.This file cannot be registered."

    I rebooted and it worked for a while but then started doing the same thing again.  Haven't been able to get it to run again.
Reply
  • Chris DeWitt
    The path is correct and points to the right version (16.6).  At one point I tried to re-register the dll and received the following.“C: \Program Files\Cadence Design Systems\Allegro Free Physical Viewers 16.6\tools\pcb\bin\callbackMgr.dll was loaded, but the
    DllRegisterServer entry point was not found.This file cannot be registered."

    I rebooted and it worked for a while but then started doing the same thing again.  Haven't been able to get it to run again.
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