Error message Could not load file or assembly TAC.Common.License.Flex.dll when loading TAC Vista Webstation.

Issue

Get error message when loading TAC Vista Webstation:
"Could not load file or assembly TAC.Common.License.Flex.dll or one of it dependencies. The specified module could not be found."

Product Line

TAC Vista

Environment

TAC Vista 5.1.4
TAC Vista Webstation 5.1.7

Cause

When installing TAC Vista Webstation it must always be the same version as the TAC Vista server.

Resolution

Upgrade TAC Vista server to version 5.1.7 or downgrade TAC Vista Webstation to version 5.1.4.