Thanks for explaining

One more addition if you permit me - How to add delay after each step ? I am thinking something like this-

 system 'echo -e "r"; sleep 2; echo "Y"; sleep 2; echo "r" | phylip sub_program_1';

I am sure, above code is wrong :( bcoz it is not working !

I suspect, lack of delay is causing "phylip" to abort after first command.

Out of context remark - This conversation appears to be like happening face to face... and I am liking it :-)

In reply to Re^4: How to execute external programs from perl script by chak9988
in thread How to execute external programs from perl script by chak9988

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