I am trying to use the if function on my userform to only allow certain values to be returned from the input of other values on the userform. I also want a message box to appear if certain fields are left blank based upon which data has been entered. Here is my code, but even when I have data input into the "Valve Position" combo box it still tells me "Data needed" Why?
Here is just an excerpt of my code:
Any advice?![]()
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Thanks in advance.
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