Issue
Unable to save a Function Block or Menta program that contains a module named "IO" in StruxureWare Building Operation 1.4.1
Environment
Function Block program
Menta program
SmartStruxure 1.4.1
Cause
A bug prevents using "IO" as a module name in Building Operation 1.4.1
Resolution
Changing the module name will allow you to save. However, this bug is fixed in Building Operation 1.5.
