FOR loop variables - not utilized immediately

[tcurdts]

Greetings,

I'm using WindowsXP Pro v5.1and am writing a BAT file to loop through a list of files (contained in a .txt file) and pass them (actually variables derived from them) to another program (ERDAS Imagine). What appears to be happening is that the FOR loop isn't utilizing the variables until the 2nd iteration after the variable is set. Since one variable is dependent on another, I have to run the program 3 times before the variables are correctly utilized. The 3rd time I run it the program works fine.

My original input list that I was using for testing had only two entries. To try to isolate what was going on, I made two separate FOR "loops", each with one entry. I've written in lots of echoes but still don't understand what's going on.

This is a subset of a larger program so let me know if you need more context. I'll include the relevant code below plus the echoes and results from the "set" command at the c:> prompt.

Here's the code:

ECHO OFF
 
REM Testing var settings w/in imagine line
REM     and issuing import command for H3 and H1 header files
 
set intar=C:\WorkSpace\LTC\MRLC_test\NZT
echo *****         intar = %intar%
 
set outtar=C:\WorkSpace\LTC\MRLC_test\NZT\tmp2
echo *****        outtar = %outtar%
 
set tlist=tarList1.txt
echo *****         tlist = %tlist%
echo.
 
REM Create separate text files containing name of H1 and H3 header files
dir /b %outtar%\*.H1 > %outtar%\hdr1Name.txt
dir /b %outtar%\*.H3 > %outtar%\hdr3Name.txt
 
REM Establish variable for text file containing H3 header file name
set hlist3=%outtar%\hdr3Name.txt
 
for /f %%h in (%hlist3%) do (
   set headr3=%%h
   set hbase3=%headr3:~0,18%
   set  hex3=%headr3:~19,2%
   echo ***** Header3 file is %headr3%
   echo ***** Basename3 is %hbase3%
   echo ***** Extension3 is %hex3%
   echo.
   REM Open Imagine and call the import NLAPS script
   start "" "C:\Program Files\Leica Geosystems\IMAGINE and LPS 9.0\bin\ntx86\importndf.exe" -inputfilename "%outtar%/%headr3%" -outputfilename "C:/WorkSpace/LTC/MRLC_test/IMG/%hbase3%_%hex3%.img" -pixeltype u8
)
 
REM Establish variable for text file containing H1 header file name
REM Originally this loop was incorporated in the loop above, but I separated 
REM      them for diagnostic purposes.
set hlist1=%outtar%\hdr1Name.txt
 
for /f %%h in (%hlist1%) do (
   set headr1=%%h
   set hbase1=%headr1:~0,18%
   set   hex1=%headr1:~19,2%
   echo ***** Header1 file is %headr1%
   echo *****    Basename1 is %hbase1%
   echo *****   Extension1 is %hex1%
   echo.
   REM Open Imagine and call the import NLAPS script
   start "" "C:\Program Files\Leica Geosystems\IMAGINE and LPS 9.0\bin\ntx86\importndf.exe" -inputfilename "%outtar%/%headr1%" -outputfilename "C:/WorkSpace/LTC/MRLC_test/IMG/%hbase1%_%hex1%.img" -pixeltype u8
)
 

Here's what the echoes look like for the first three runs:

1ST RUN:
C:\>C:\WorkSpac e\LTC\MRLC_test \scripts-bats-docs\setvarInIm agine2.bat
C:\>ECHO OFF

***** intar = C:\WorkSpace\LT C\MRLC_test\NZT
***** outtar = C:\WorkSpace\LT C\MRLC_test\NZT \tmp2
***** IMG directory = C:\WorkSpace\LT C\MRLC_test\IMG
***** tlist = tarList1.txt

***** Header3 file is
***** Basename3 is
***** Extension3 is
***** Header1 file is
***** Basename1 is
***** Extension1 is

Set:
hbase1=~0,18
hbase3=~0,18
headr1=LE708301 4000019251.H1
headr3=LE708301 4000019251.H3
hex1=~19,2
hex3=~19,2
hlist1=C:\WorkS pace\LTC\MRLC_t est\NZT\tmp2\hd r1Name.txt
hlist3=C:\WorkS pace\LTC\MRLC_t est\NZT\tmp2\hd r3Name.txt

2ND RUN:
C:\>C:\WorkSpac e\LTC\MRLC_test \scripts-bats-docs\setvarInIm agine2.bat
C:\>ECHO OFF

***** intar = C:\WorkSpace\LT C\MRLC_test\NZT
***** outtar = C:\WorkSpace\LT C\MRLC_test\NZT \tmp2
***** IMG directory = C:\WorkSpace\LT C\MRLC_test\IMG
***** tlist = tarList1.txt

***** Header3 file is LE7083014000019 251.H3
***** Basename3 is ~0,18
***** Extension3 is ~19,2

***** Header1 file is LE7083014000019 251.H1
***** Basename1 is ~0,18
***** Extension1 is ~19,2

Set:
hbase1=LE708301 4000019251
hbase3=LE708301 4000019251
headr1=LE708301 4000019251.H1
headr3=LE708301 4000019251.H3
hex1=H1
hex3=H3
hlist1=C:\WorkS pace\LTC\MRLC_t est\NZT\tmp2\hd r1Name.txt
hlist3=C:\WorkS pace\LTC\MRLC_t est\NZT\tmp2\hd r3Name.txt

3rd RUN:
C:\>C:\WorkSpac e\LTC\MRLC_test \scripts-bats-docs\setvarInIm agine2.bat
C:\>ECHO OFF

***** intar = C:\WorkSpace\LT C\MRLC_test\NZT
***** outtar = C:\WorkSpace\LT C\MRLC_test\NZT \tmp2
***** IMG directory = C:\WorkSpace\LT C\MRLC_test\IMG
***** tlist = tarList1.txt

***** Header3 file is LE7083014000019 251.H3
***** Basename3 is LE7083014000019 251
***** Extension3 is H3
***** Header1 file is LE7083014000019 251.H1
***** Basename1 is LE7083014000019 251
***** Extension1 is H1

Thanks in advance,

Thom Curdts

[tcurdts]

One more thing...

Line 24 of the code is where it starts to fall apart. That variable seems to be set, but not utilized until the next time the program is run.

Thanks again...

[epots9]

i'm hoping that this can be useful for u http://www.robvanderwoude.com/ntfor.html

good luck

[bartonc]

i'm hoping that this can be useful for u http://www.robvanderwoude.com/ntfor.html

good luck

Great link (I've bookmarked it), thank you.

[epots9]

Great link (I've bookmarked it), thank you.

np, glad i could help :D

[tcurdts]

Thanks. I've seen that page but still can't figure out why my variables don't seem to be set immediately...

[tcurdts]

I'm still not sure why the variables weren't getting set right away but I figured out an alternate method.

Instead of setting variables on lines 24, 25 and 26 (code from original post) I used "tokens" in the FOR statement to parse the filenames, for use on line 7 below. The relevant portion of the new code looks like:

set hlist=%outtar%\hdrList.txt
FOR /F "tokens=1,2* delims=." %%y in (%hlist%) DO (
    echo ***** Current Header file is %%y.%%z
    echo *****       File Basename is %%y
    echo *****      File Extension is %%z
    echo IMPORTING %%y.%%z.  Please be patient...
    "C:\Program Files\Leica Geosystems\IMAGINE and LPS 9.0\bin\ntx86\importndf.exe" -inputfilename "%outtar%/%%y.%%z" -outputfilename "C:/WorkSpace/LTC/MRLC_test/IMG/%%y_%%z.img" -pixeltype u8
)