Lately we run into following problem. Doing different action in Dynamics AX client we got Dynamics AX 2009 Debugger pop up and following error:

Error executing code: Wrong argument type for function.


The problem was caused that application and Client was running on different build version.
Client was AX 2009 RTM (5.0.593.xxx) and application on 2009 SP1 (5.0.1000.52)