Error Handling

[Dark Hollow]

I an relatively new to LabVIEW.  My typical application is testing.  For example, I set a number of registers, modes, blah, blah, then perform a test.  Finally, I return registers to their original state.  The problem lay in that, if I get an error in the process, the rest of the code, including the part where I return registers to proper values, is not run.

Any suggestions on how best to handle this in LabVIEW?

DH

[Ben · Accepted solution]

Sounds like your preceeding error is preventing the clean-up from running.

Don't propogate an error cluster that could carry an error to functions that required to clean-up and place it in a safe state.

Instead run the error cluster around those functions and use a Merge Error node to make sure you don't loose the message.

Ben

[Dark Hollow]

Thanks, Ben.

DH

[Been bitten by LabVIEW]

Becareful of ordering though.  Many people use the error clusters as a means of enforcing order.  You many have to use a sequence diagram or other means to ensure proper exeuction order.

A

[Dark Hollow]

By sequence diagram, do you refer to what LabVIEW calls a "flat sequence" structure?

You point is well taken.  If I understand your terminology, I can envision the solution.

DH

[Been bitten by LabVIEW]

Flat or stacked.

Good luck.

A

[ohiofudu]

Hi,

I will go for flat sequence.

Ohiofudu

CLD