Errors in downloading to plc from proficy

I am using Proficy 7.0 and have been getting errors trying to update my Rx3i controller logics . A few of the errors is shown below:

"Validating Services
Error 4368: Variable name [.A] is invalid
Error 4368: Variable name [.B] is invalid
Error 4368: Variable name [.C] is invalid
Error 4368: Variable name [.D] is invalid
Error 4368: Variable name [.PG90AX2] is invalid
Error 4368: Variable name [.PG90AX3] is invalid


Error 1003: Error count exceeds 100; stopping build
Tip: Press Shift+F3 to cycle through errors; F4 to cycle through errors and warnings."

The error presupposes that the variable names are incorrect. How can i convert these variable names to valid ones acceptable to proficy? or how do i raise the error count to proceed with the download?