Problems creating thumbnails

Hello, I create miniatures from the catalog of the walls but the miniatures were not created


I see a problem message. "The operating system was unable to load tfdsimagegen.dll error 126"

But this file exists


How can I solve it?

Regards.

Joaquín

AECOsim Connect Edition 10.00.00.154 Dataset_US

Windows 7 64 bits spanish version