Fehri-
Ok, let�s try the following:
First, try adding �::INSTR� (without the quotations) to your VISA commands, so that the command for ASRL appears as �ASRL1::INSTR�. Repeat this addition for ASRL1, ASRL2, ASRL3, and ASRL4 depending on which instruments you wish to read data from in your LabVIEW VI.
If this fails to correct your problem, please follow the instructions in the link below to properly change the address names (alias�) for each instrument.
Instrument Alias Change within MAX (NI Measurement & Automation Explorer)
Once you change the instrument alias within MAX, you can simply call it by the respective name in LabVIE
W, simplifying the code. For example, device ASRL1::INSTR can be renamed to �thermocouple1� and called by �thermocouple1� in LabVIEW. This nomenclature is a bit more intuitive if other people will be reading/modifying your code in the future.
I hope this solves your problem! Please let me know if you need further assistance. Have a great day.
Best Regards,
Joe Des Rosier
National Instruments