expression syntax in TestStand 4.0 tutorial

[Kirika]

Hello All
 
Teststand is new to me, and I am trying its tutorial with "Using TestStand" manual.
 
At the Using TestSTand page 3-7, Insert a Template Step step 7, we insert a
message popup "Retry if Previous Step Fails".  This step has post action "Goto Step",
but it doesn't goto next step and uses an expression "RunState.PreviousStep.TS.Id".
I can't find the expression at the expression browser and don't know what this means.
There is a RunState.PreviousStep at the expression browser but no "TS.Id". 
I've attached a pic (teststand_ques.jpg) to show the expression.  Could anyone
tell me its meaning. 
 
Also, is there any manual or guide of TestStand expression syntax?  I know expression
browser shows its operator and functions, but I'd like to have a detail reference manual.
 
 
Thank you
 
 


teststand_ques.JPG:
Loading Image...

[Ray Farmer]

Hi,
The TS is a hidden property of the Step.
You can unhid this property by a setting in the Station Options select the Preference Tab.
You actually dont need to enable this setting, you could of just typed it in (, the .TS.id I mean). But when learning it is handy to see all the properties.
Regards
Ray Farmer
 

[Kirika]

Hi Ray
 
Thank you! It's the answer I want.
You're also the one who replies my last post.
 
However, I'd still wonder if we have a guide for
expression.  If so, it would be very helpful for
users like me
 
Regards,
 
Kirika

[Ray Farmer]

Hi Kirika,
Have you tried the TestStand Help, the only other place is the help you see in the Expression browser for each function.
Regards
Ray