Display returns an incorrect number.

Select a craft named "New". Activate a stage and it would perform an automated suicide burn test. When it falls down from the highest point, it would display some numbers. The rightmost one would be "Er: 0". A little bit after it starts the suicide burn, the Er would display the error of the burn: actual height minus the height it should be at the time.

Problem is "Er: 0" displays some number around 26~27 depiste of everything. Even if you change the blocks in the expression, it would still display the same number.

The error number is defined by the custom expression marked. You can add, subtract, basically can do anything and it will always say some 27~28i sh number.