Batch file scripting issue

Question

I am performing a certain operation on a number of files and following is the bat file script written for it. names of the files are of this type: aspen_1M_bursty_25_1.pcap

@FOR /L %%i in (1,1,10) do (
   @%decoder% -i L:\martin\05_distorted\Elecard\%~n1_bursty_25_%%i.pcap -o L:\martin\05_distorted\Elecard\%~n1_bursty_25_%%i.avi
)

Th problem is, this script adds '-' inside and ends up calling the command like the following:

-i L:\martin\05_distorted\Elecard\-_bursty_25_1.pcap -o L:\martin\05_distorted\Elecard\-_bursty_25_1.avi 
                                  ^                                                    ^

Hence it would return an error that there is no such file as the names of the files have no '-' in them:

The above script is in a bat file and I am calling the bat file through command prompt.

How to get rid of this '-' thing? :)

How are you running the script? Please show the full commandline. — Ansgar Wiechers
– Ansgar Wiechers, Commented Sep 6, 2013 at 12:56
The output redirection operator is >, not ->. Use name.bat aspen_1M >log.txt. — Ansgar Wiechers
– Ansgar Wiechers, Commented Sep 6, 2013 at 16:04

PA. · Accepted Answer · 2013-09-06 14:47:36Z

1

The problem is in the %~n1 substitution parameter. Read HELP CALL to understand how this works.

In your case, %1 is the first parameter passed to your code.

So you need to review the way you invoke this code.

If this a :label being CALLed, then review the CALL command.

If it is in the main BAT script, then review the way you invoke the BAT from the command line, or from another BAT.

It seems that you are passing "-".

name.bat ->log.txt

If you, instead, pass "aspen" it should work correctly. This way:

name.bat aspen >log.txt

edited Sep 6, 2013 at 14:47

answered Sep 6, 2013 at 10:32

PA.

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1 Comment

PA. Over a year ago

sorry, but the answer solves your problem. You are actually passing a "-" parameter. So, instead of name.bat ->log.txt invoke it as name aspen >log.txt

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