Tia Portal V13 Sp1 Update 4 Exclusive -

: The behavior of the S_CONV (string conversion) instruction's enable output (ENO) changed to return a signal state of "1" even if deactivated, ensuring subsequent instructions execute as expected.

: Automatic support for F-blocks that were previously marked as "Unsupported" after a project upgrade. Mobile Panels 2nd Generation - Siemens Tia Portal V13 Sp1 Update 4

From Siemens’ official readme:

Thus, is the final, most polished version of the V13 SP1 lifecycle. It directly replaces earlier updates (Update 1, 2, 3). : The behavior of the S_CONV (string conversion)