Hey there everyone,
I came across something strange (to me) with the F_READ command that I
thought I would share. Of course it's probably not news to some of you, but
whatever.
The F_READ command in the following macro excerpt was doing nothing even
though the txt file was written properly (one integer per line):
INTEGER:#FIXGROUP
WHILE(whatever)
<a bunch of irrelevant commands>
F_OPEN[FN="C:\\SM9\\DATA\\WORK\\-SPM\\MACROS\\GROUPCHK.TXT", TY="W"]
GET_GRP[AR=0, GN=#RGRP]
#FIXGROUP=GRP(0)
NEW_GRP[]
F_WRITE[FN="C:\\SM9\\DATA\\WORK\\-SPM\\MACROS\\GROUPCHK.TXT", FMT="%I~n",
VR="FIXGROUP"]
ENDW
F_CLOSE[FN="C:\\SM9\\DATA\\WORK\\-SPM\\MACROS\\GROUPCHK.TXT"]
And now, the attempt to read:
F_OPEN[FN="C:\\SM9\\DATA\\WORK\\-SPM\\MACROS\\GROUPCHK.TXT", TY="R"]
#COUNT=1
WHILE(#COUNT<=#NUMTOOLS)
#RGRP=STRTMP("R%COUNT")
GET_GRP[AR=0, GN=#RGRP]
#INGRP=GRP(0)
F_READ[FN="C:\\SM9\\DATA\\WORK\\-SPM\\MACROS\\GROUPCHK.TXT", FMT="%I",
VR="FIXGROUP"]
WHILE(#INGRP>#FIXGROUP)
ELMT_GRP[AR=1, EL=GRP(#INGRP)]
#INGRP=GRP(0)
ENDW
NAME_GRP[GN=#RGRP, RM=0] //group is restored
NEW_GRP[]
#COUNT=#COUNT+1
ENDW
F_CLOSE[FN="C:\\SM9\\DATA\\WORK\\-SPM\\MACROS\\GROUPCHK.TXT"]
The variable #fixgroup was not being read in at all. I verified this by
setting it to zero before the F_READ and that's the value that it had after
the F_READ.
Anyway, after a few less hairs on my head, I noticed that the F_OPEN command
before the F_WRITE was inside the WHILE loop. But I didn't pay any
attention to that since the txt file appeared to be written properly. After
all, it was the F_READ that was the problem.
But, when I finally moved that first F_OPEN before the WHILE loop, the
F_READ worked properly. Keep in mind the text file looked identical in both
cases; one integer per line.
Is there an explanation for this? Or is it just Rod Serling making another
appearance?
Regards,
Pete Ruehle
SPM
Armonk, NY
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