I haven't had any problems until this morning with loading Mach4.  The following error popped up this morning.

0Lua: Error while running chunk
wxLua:
Expected a 'boolean' for parameter 2, but got a 'string'.
Function called: 'mcIoSetState(number, string, number)'
01. mcIoSetState(number, boolean)
stack traceback:
[C]: in function 'mcIoSetState'
 ?: in main chunk
 ?: in main chunk

The machine is still running fine, I just don't know why we are getting this error all of a sudden.  

Any Ideas?

Found my problem.  I had a bad custom macro in my profile.