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• Semantic Error (SEM1190): The specified IEC type '...' is inaccessible.

Semantic Error (SEM1190): The specified IEC type '...' is inaccessible.

This error message relates to a referenced user library:

First possible reason: The included library contains a user-defined data type whose 'Visibility' has been set to 'Hidden' when releasing the library. In your current project, you have tried to declare a variable of this data type although this user-defined data type is hidden.

Second possible reason: An FB contained in a user library calls an FB which is part of your current project. This is not allowed. Correct the included user library FB accordingly. The invalid call may result from moving the user library FB from the current project into a user library after having inserted a call of the project FB.