How to add / Subtract Character for SUBSTRING - causing some data type issue wrong data type or has

Hi Anonymous ,

Because there are 0 values in the return value of your variable "Var Len_First = SEARCH("First",'Require Comment'[Note Comment],,0)", and the -1 will exist after subtracting 1. And using -1 as an argument in the function LEFT will result in an error.

Please try modifying the variable to the following formula.

Var In_Substring =
    LEFT (
        RIGHT ( 'Require Comment'[Note Comment], TotalLenght ),
        IF ( Len_FirstCallback = 0, 0, Len_FirstCallback - 1 )
    )

If the problem is still not resolved, please provide detailed error information or the expected result you expect. Let me know immediately, looking forward to your reply.
Best Regards,
Winniz
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