AutoPlant Model File Errors - Need Help To Resolve

Hello,

The piping model I was updating unexpectedly received errors when launching AutoPlant.  I was using  AutoPlant without any issues one minute, closed down the model to rerun the Navisworks file and re-entered to continue working whereby at this point I received the following error:

 

My previous session of AutoPlant successfully saved and closed down without any known issues.  No error warnings etc.

 

If I say no to the above dialogue box then I receive the following messages:

 

Finally, if I try to continue working in AutoPlant and try to make and changes, add anything new, then this eventually causes the model file to crash upon receiving this final warning message:

 

I so far have attempted to use the ‘back-up’ model file from a period prior to receiving these problems yet this for some reason still prompts the same issues.  As it stands I am unable to make any design progress with this model file in particular.  FYI, a colleague of mine is working on a different model file and has not received any errors in his area, yet does receive the same errors that I experience if he attempts to open up my file.  It seems the errors are confined to the model file rather than user/PC.

 

Any assistance which could help resolve these errors would be greatly appreciated.

 

Regards,

Phil Wheatley.