Scripting and multiplexed tags

Dear Forummembers ,

I'm facing a problem to write a script for reading the value of multiplexed hmitags. V13-SP1 / TP1500

The multiplexed tags are internal and in relation to a second internal tag ( index) they must show the value of a plc_tag in PLC1 or PLC2.

The code :

If SmartTags("mode_VP5001") = 1 Then SmartTags("CTL1_AUX_SP_DRUK")=90  returns a compile error object has an invalid type VARLIST for functions.

If the SmartTags("mode_VP5001") is replaced with a tag that is directly connected to a plc-tag then there is no error.

Can somebody explain me how to use a multiplexed tag inside a script .

Thanks in advance