INSTRUMENT I/O ASSISTANT EXPRESS VI - PERFECT PARSING NO OUTPUT

[oledaqman]

I am using the Instrument I/O assistant express VI to parse data from a (visa) serial port. Neatest thing since sliced bread! I initially send a write command followed by eight read/parse commands to retrieve eight tokens each ending with cr/lf. All seems well during i/o setup. The Vi compiles and shows all eight string tokens. I then connect each one to a string indicator. When the Vi is run no data appears in the indicators. Repeated runs during the I/O setup shows tokens extracted perfectly. What's going on? 

[JasonSmith]

Hello oledaqman,

I tried to replicate the problem you are seeing, but everything seems to work fine on my system.  One option I would propose would be to use NI-SPY to determine if the reads are actually being performed when you run the VI.  NI-SPY should allow you to determine if the VISA commands inside the Express VI are being executed, as well as determining whether they are receiving any data.

This will help us to determine whether the problem lies in the actual transmission of the data, or the parsing of the data after it is received.

Let us know what you find, or if you have any questions, and we will be happy to help.

Jason S.
Applications Engineer
National Instruments