Deployment & Troubleshooting Flashcards
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Read the first 7 Deployment & Troubleshooting flashcards as text
After deploying an updated sequence file to a production test station, technicians report that the new limits are not being applied. The old sequence appears to still be running. What is the most likely cause?
Answer: The sequence file was deployed to the wrong directory and the station is loading from a cached path
If the deployed file lands in a different directory than the one configured in the station's search path, the station continues loading the old version from its original location.
A TestStand sequence uses a LabVIEW code module. On the deployment target, the code module runs but produces incorrect results. The same module works correctly on the development machine. What should you suspect first?
Answer: The LabVIEW Run-Time Engine version on the target does not match the version used to build the code module
A mismatch between the LabVIEW RTE version on the target and the version used to build the .llb or .exe can cause incorrect behavior due to API or behavior differences.
Which TestStand tool is used to analyze and compare two sequence files to identify differences between a deployed version and an updated version?
Answer: TestStand Diff & Merge Tool
The TestStand Diff & Merge Tool allows developers to visually compare two sequence files and identify structural and parameter differences.
A test station running a deployed TestStand application periodically hangs during sequence execution with no error message. CPU usage is near 0%. What is the most likely root cause?
Answer: A deadlock caused by two threads waiting on each other's locked resources
A CPU-near-zero hang in a multi-threaded TestStand execution is a classic symptom of a deadlock, where two execution threads are each waiting for resources held by the other.
When deploying a TestStand system that uses custom user interfaces built with LabVIEW, which additional component must be included in the installer?
Answer: LabVIEW Run-Time Engine matching the LabVIEW build version
LabVIEW-based user interfaces require the LabVIEW Run-Time Engine (matching the build version) to execute on machines without LabVIEW installed.
A sequence step using an ActiveX/COM code module fails on the deployed station with 'Class not registered'. What corrective action is required?
Answer: Register the COM/ActiveX server on the target machine using regsvr32 or include it in the installer with registration
COM/ActiveX components must be registered in the Windows Registry on each target machine, either manually with regsvr32 or automatically through an installer that handles registration.
Which TestStand Station Options setting directly affects how errors propagate when a step fails in a called subsequence?
Answer: Execution > Propagate Errors from Subsequences
The 'Propagate Errors from Subsequences' setting determines whether an error in a called subsequence automatically causes the calling sequence to also enter an error state.