Failed Upgrading 2019 to 2020: Corrupt Model Error

[bstockton_sapp]

Was attempting to upgrade a series of R19 models to R21 and I keep on the error that the files is corrupt and needs to be repaired manually. I believe several models were created off the a model in the group so the same issue has most likely translated to others. 

I have tried detaching, purging, deleting cache files, renaming files, the whole shebang. I have tried looking at the journal but I haven't been able to decipher the issue and find the error.

If anybody is looking for a challenge could you please take a look or offer and suggestions. 

[martijn_pater]

Did you audit the model while updating? (Check audit when opening from dialog)

[barthbradley]

Does your R19 and R20 have the same add-ins?  

[bstockton_sapp]

audit while opening the bim360 model. Saved-as to local. Audit opening model while local. Saved. Open model in R21 with audit and get corrupt model, restore manually. 

[bstockton_sapp]

Same addins. I have even deleted the addin folder in the directory for both R19 and R21 while trying to upgrade. 

[Yien_Chao]

@bstockton_sapp ,

i can take a look i you dont mind to send link.

[syman2000]

Do your model have Revit links or CAD links? Perhaps unload them first in 2019 and try upgrade it. Sometimes links can cause the upgrade to failed.

[RobDraw]

Since you have ruled out/tried the obvious problems/solutions, it might be time to start digging into the families. I saw a AKN page last week describing how to analyze the families. Unfortunately, it's a one by one process.

[bstockton_sapp]

I have exported all families from the project. The only family errors during that process were regarding objects that needed to have their constrains removed. 

Earlier in troubleshooting I didnt find some families that would not export or open to edit, reloading them seemed to correct that issue.

[bstockton_sapp]

Thought of this as well. Tested a model that was in an early phase that didn't include any links (dwg or revit) and the file got the same error while upgrading.