Error -17501 in Teststand3.1 when accessing SelectedSteps

[LVFan]

If I try to query the property SequenceContext.SelectedSteps, I'm getting the errorcode -17501 (Unexpected Operating System Error).

This happens only in Teststand 3.1 not in Teststand 2.0.1.
I tried Labview6.1 and 7.1, but it returns always the same error.

[Scott_Richardson]

LVFan -
Starting in TestStand 3.0, we had to support vtable access to our COM API, so the entire API was touched. It appears that internally when returning arrays for the sequence context, we incorrectly validate the type of the elements and we throw an error when the type appears to be incorrect. It appears this problem occurs in 3.0 and 3.1.

A workaround is to use the property object interface, i.e. call
object = context.AsPropertyObject()
stepArray = object.GetPropertyObject("RunState.InitialSelection.SelectedSteps", 0)

Thank you for bringing this to our attention.
Scott Richardson (NI)

[LVFan]

Thank you for your quick answer.

Is there an list of known bugs in Teststand3.1 in the web? I didn't find one on the support pages.

[Scott_Richardson]

LVFan -
NI posts known items to the knowledge base when appropriate. They are not catorgize by any specific list for you, but you should be able to search.

Scott Richardson (NI)