Autoplant/Autocad drawing file stuck at the point “At_start_doevents” while opening

Dear Bentley Family,

When we open any multiple (second/third) autocad drawing , its stuck at the point “At_start_doevents” as shown in the attached pdf-screesnshot. Its not going further . Due to this we are not able to open multiple drawing.

Please let me know any solution and why its stuck at this point .

 Waiting for your earliest reply.

 

Note - We are using:

Software :  Bentley Autoplant V8i - SS4 version : 8.11.9.140 , Autocad 2012-64Bit , Naviswork 2013 , Inventor Ultimate 2014-64 Bit , MS-Office 2010 - 64 Bit.

Hardware : Workstation Dell Precision T3600