Experimental Physics and
Industrial Control System

Paul Nord <[email protected]> · Thu, 8 Dec 2011 08:16:24 -0600

Dirk,

I'm not certain how CALC handles this, but doesn't the standard C expression require this form:   W = X?Y:Z
This should render code equivalent to:
	if (X!=0) {
		W = Y;
	} else {
		W = Z;
	}

Without the colon and another value, your line simply says:  B = A

Perhaps the full line should have been in this form:
	B==0?A:C
Or this might be allowed:
	B==0?A
But I'm not sure what it does if "B==0" is false.

Paul

On Dec 8, 2011, at 3:21 AM, Dirk Zimoch wrote:

> Hi all,
> 
> When I tried to upgrade from 3.14.8 to 3.14.12, I found that some CALC expressions are not working any more, e.g. "B=0?A"
> 
> In 3.14.8 and all previous versions that meant: If B is 0 then set VAL to A otherwise don't change VAL.
> 
> Now, I get the error message:
> 
> Unbalanced conditional ?: operators in CALC expression 'B=0?A'
> Can't set "recordname.CALC" to "B=0?A"
> 
> Was there any good reason for this incompatible change in the CALC behavior?
> 
> Dirk
> 

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System