check string for number

[Jeroen_Mechatronics]

Hi,

In my application, TestStand receives a response from a DLL I call. This DLL can either return a numeric value (casted in a string), like "120" or some text casted in a string, like "ERROR". I would like to make the test step fail, if the returning string is NOT a number.

Anyone any clues on how to do this? I looked for something like a IsNumeric function, but could not find one.

Jeroen 

[RayFarmer · Accepted solution]

Hi,

You can use the function Val(string, <isValid>) in an expression to convert your string to a value. Check the help for this function.