RCDC Design Calculation Print

Hi Good day!

I am having a problem with the printing of my Design Calculation Report,

when it is already generating the design calculation report an error message pops out. See attached.

Error Translation:

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Microsoft.NET Framework

An unhandled exception has occurred in a component of your application.  If you click Continue, the application ignores this error and tries to continue.  Click Exit 1 to exit the application immediately.  The item has already been added.  Dictionary key 2985 Added key 2985.

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When "continue" is selected it just generates the report forever. 

What should be done? Thank you for your help