SpecGen error "This key is already associated with an element of this collection"

When trying to open Spec Generator I get the message "Error occured during execution. Please refer to ErrLog.txt for details."

Recent lines in ErrLog.txt reads:

Error Number: 457
Error Source: RebisSpecServices::Application::Init->GetProject->LoadClassInfoFromDB->APSpecServicesAN19
Error Description: This key is already associated with an element of this collection

The problem has just started today and only occurs with one project - other projects work fine.

What does the message mean and what should I do?




AutoPLANT V8i SELECTseries 6 ( with AutoCAD 2014 64 bit

Specification Generator V8i SELECTseries 6 (

Specs are not embedded in project DB


  • Hello Henrik,
    Are you able to use same spec in other projects? Try to copy spec to some sample project and open it once again. Let me know results.
    Try to compare config.ini files, maybe there are some special trailing characters in path settings.
    If you will be able to reproduce same error in Sample project. Please upload spec and related catalogs via secure upload. I will try to reproduce this issue and investigate it further.