Calculation Error "Error processing script: 'A#All = 0 * A#All"

I was running into issues clearing durable data prior to Clearing it so I calculated the data prior to the Clear statement so the data was "calculated", then ran the ClearCalculatedData stmt.  It works fine for me, but I have admin access and it works fine for a select few users.  But for the majority of users they receive the error "Error processing script: 'A#All = 0 * A#All".  I can not easily test in Prod as my hands are tied as far as making security changes.  In prod I have other users with the same set of security groups (just pointing to other entity WFs) and they do not receive the error.  In our Dev environment I can set up a native user with the exact same security groups as a prod user that fails and I do not receive an error.  As for it being an issue with data, I have an entity where 1 user can run it and another can not.  And they have the same set of security groups. 

Does anyone have any thoughts on what is going on?

I also thought that the ClearCalculatedData should have been able to clear it (durable data) with the Boolean set to true, but it doesn't.   

Does anyone have any thought on why the clear does not work w/o calculating the data prior to clearing it?  I did see a note about the ClearCalculatedData that the final argument must be true to clkear any data with a storage type Durable. But I'm not exactly sure what this means - can someone clarify that statement for me?

This is the code:  

This is the error: