RE: CALC expression

["Mark Rivers" <rivers@cars.uchicago.edu>]

I suspect your CALC expression is longer than 40 characters and that is
the source of the error.

Mark


-----Original Message-----
From: tech-talk-bounces@aps.anl.gov
[mailto:tech-talk-bounces@aps.anl.gov] On Behalf Of Andrew Wagner
Sent: Tuesday, September 28, 2010 3:04 PM
To: tech-talk@aps.anl.gov
Subject: CALC expression

Hey everyone, 

I need to evaluate a somewhat complicated conditional statement in a
calc record. Presently I need to evaluate: 

 field(CALC, "(235>B && 5>D && 5>E) ? (B*0.00835 - 0.7 > A + (C-B)*0.25
? B*0.00835 - 0.7: A + (C-B)*0.25): 0")

where the letters are input variables. When I load the record I get the
error

Can't set "VOLT:PID.CALC" to "(235>B && 5>D && 5>E) ? (B*0.00835 - 0.7 >
A + (C-B)*0.25 ? B*0.00835 - 0.7: A + (C-B)*0.25): 0"
Error at or before ")" in file "MagnetCtrlApp/Db/MagnetCtrl.db" line 113

Does CALC not support nested evaluations? Perhaps I need a subroutine
record? Any advice would be greatly appreciated. 

Cheers, 

Andrew