“Could not load file or assembly GPConnNet.dll or one of its dependencies. An attempt was made to load a program with an incorrect format.”
The above error message can occur when attempting to deploy a KampData TaxEngine integration on a computer that has not had Microsoft Dynamics GP installed. The GPConnNet.dll is installed automatically when installing Microsoft Dynamics GP and is used for Dynamics Encrypted Passwords.
Here are a couple different options that you can use to resolve this issue.