When running an upgrade of a 7.3 environment to 7.10, the upgrade failed to convert custom dlls. The custom dlls were then upgraded to version 7.10 and resupplied to the user in order to migrate them into their environment. APM then failed to generate a short-cut indicating that the custom dlls for RH were compiled in the wrong version of APM.
Manually recompile the code using EXPLinkCodeGenerator from the bin folder. User was then successful in generating the thick-client shortcut and the thick-client launched successfully. We needed to regenerate Schema as a final step.