Error message:
An inconsistent element has been detected (Improper inputs count). Consider making a correction.
Unknown box type xxx_TO_xxx.
Reason for error message:
Some library blocks with the name "_TO_" (i.e. block names such as "BYTE_TO_STRING") generated incorrect error messages in addon version 4.3.0.0 and can not be used. If a project with blocks created in this way is opened with a CODESYS with the addon "CODESYS LD FBD" in a version lower or higher than 4.3.0.0, the above error messages are displayed for this POU. The error status is stored invisibly in the function block and is only overwritten during generation or a forced update.
Error fixing:
Execute the "Update Parameters" command on the POU (context menu by right-clicking on the block). The error messages should no longer appear.