GSV Not Actuating GSV


I'm using an online GC1530A for analysis of my reactor product stream.  Recently, the GC quit functioning properly.  When I run the GC from the software, the GSV never actuates and injects a sample.  However, if I go use the front panel to manually turn on the GSV on and start a run, the valve actuates and the GC works as designed.  What could be wrong with my software and/or GC that is preventing the programmed method from injecting sample?

Thanks in advance!

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