Error in Creating the output file. Check the materials and loading data."

Hi,Thanks for this good program
I have a question

when I use SI units ,I get error as " Error in Creating the output file. Check the materials and loading data."
but when I change units to US units ,this problem is not here.
Why this problem is SI units?
what do I in this problem?

Thank you very much.

Dear Roadcivil
This is a nice program, I like it very much and I have no error with SI units.
Please send me your data to check: mail to [You must be registered and logged in to see this link.]
Thanhks!

Dear Roadcivil,
It is hard to address the cause of the problem without having the input folder. Please email me the folder (zip) at [You must be registered and logged in to see this link.].
Thank you.