This is a question that cannot be answered. There is lots of documentation among these pages, read it. All. Especially read the Quick'N'Easy Tutorial. If you have problems, ask. Tell the people what you wanted to do, how you tried to do it, what went wrong and how you noticed something went wrong.
Include at least everything you wrote in the command file in your question. Try to write in a language everybody understands. If you ask
hi ppl, i wanted 2 use it but error there. can u help e on this prob if pop ack nop?nobody can help you because nobody's able to figure out what's going on. If the question reads like
Hi. I wrote a command file which looks like follows:then you'll get answers.
(...)
I've runned rvglue on it, which gave no error messages. The .w and .ncp files were created, and have correct names. But when I try to play the track, I'm stuck to the ground. Everything seems solid and looks right, but my car isn't able to jump.
You are probably reading and writing the same file. If your command file looks like
create( nhood1 ) nhood1.wthen you are successive enlarging one file by what you are merging into it. Use different files for input and output.
This is no windows program. It opens no windows. It does not ask you what it should do. You have to write some files on your own in order to use the program.
Read the Quick'N'Easy Tutorial.