Output argument is not assigned on some execution paths error inside if condition

I would like to start by saying that I realise that this question has been asked several times before and I have used similar blocks before without any issues. However in this execution I am unable to understand how to clear this error. The error is

Output argument 'measX' is not assigned on some execution paths.

Function '/Subsystem/TLS_SOH' (#60.10.15), line 1, column 11: "measX"

Attached is a image of the simulink block. The output of the said function block from the subsystem is connected to another subsystem (BMS). Both of these subsytems are triggered by the if/else condition outside.

I would also like to point out that the trigger to the first subsystem is does not affect the output measX which is 0 if the subsystem is not triggered. (checked this by removing the trigger).

Any help will be appreciated. Thanks in advance!