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PI Perfomance Equation

Question asked by Kaush12 on May 12, 2017
Latest reply on May 12, 2017 by gmichaud-verreault

I am  trying the following expression to avoid the bad input of machine data in historian


if PrevVal('Sensum_MC_1_BatchStatus',PrevEvent('Sensum_MC_1_BatchStatus', '*')) and 'Sensum_MC_1_BatchStatus' = BadVal('Sensum_MC_1_BatchStatus') then "NoOutPut" else "Resume"


but it shows an error  "Error -2147219650: PI PE syntax error in Expression. [-12315] Performance Equation: Function has bad argument data type".


please guide me how to correct these expression ?

i also attach screenshot for the same




Thanks in Advance