Hi all,
I've got a structure set up in this way:

I have a STRUCT called "Cartridge" that has values.
I have a FB called "Gripper"
The gripper has a property called "CurrentCartridge" that holds and instance of Cartridge.

In the program, I want to access the status of the current cartridge.
If I type this statement:

IF Gripper1.CurrentCartridge.Status = CartridgeStatus.Inspected THEN
    Robot.PlaceWeld(1);
END_IF

I get the error:
It is not possible to perform component access '.', index access '[]' or call '()' on result of function call. Assign result to help variable first.

However, if I assign this to a variable, it works:

G1Cartridge := Gripper1.CurrentCartridge;
IF G1Cartridge.Status = CartridgeStatus.Inspected THEN
    Robot.PlaceWeld(1);
END_IF

Is there a proper way to do it the first way? this seems really annoying.
Thank you!

You can maybe get around this by using a REFERENCE TO in your property. So your property could look like this:

PROPERTY PUBLIC CurrentCartridge : REFERENCE TO CARTRIDGE
CurrentCartridge REF= AllCartridges[currentcartridgeindex]; (*or whatever your backing variable is called*)

The same works with arrays. Of course, this only works if you have a backing variable to refer to, if you're creating it on the fly, you'll have to use helper variables.