You are getting this error because TestStand is expecting to find the TestData structure in the VI connector pane. The easiest thing to do is to add the TestData structure to the VI (found in Controls Palette - TestStand - TestData) and connect it to one of the connector pane terminals. TestStand 2.0 uses this structure to get back test data (pass/fail, numerical measurement, string measurement, and comment)from the VI. On your VI block diagram, you can wire whatever you want into this structure. If the TestStand step type is a Pass/Fail Test, the pass/fail flag will be set to the boolean memeber of the TestData structure. If the step type is Numerical Test, the numerical member of the structure will be used to evaluate against TestStand min and max limits. If St
ring Test, the string member will be used to compare against expected string. The report or comment member is used to pass comments or other strings to TestStand.
