In the Strip Units__ogtk.vi when a data type is given that is unexpected, it gives an error, which doesn't make sense. The function is to remove units when present and leave the data as it is when no units are present. There is thus no reason to cast an error when a data type is not of type SGL PQ ... CXT PQ.
Suggestion:
Remove the error message "Unexpected Data type" from the Default case in the case structure.
In addition, for the Default case, the variant should still be wired to the output. Even though you might not support the data type, there is no reason to drop the data. As stated above, it should not affect the data nor give an error when the data type is not supported.