From: Norman Geist (
Date: Wed Jul 27 2016 - 02:04:09 CDT

If you run catdcd without argument it will print its usage information. It might be a good practice for you to figure this out by yourself, but:


catdcd –o merged.dcd –otype dcd –dcd file1.dcd –dcd file2.dcd


I think even shorter is possible with just:


catdcd –o merged.dcd file1.dcd file2.dcd


Von: [] Im Auftrag von Aliasghar Alizadeh-Mojarad
Gesendet: Mittwoch, 27. Juli 2016 05:05
An: Vmd l <>
Betreff: vmd-l: merging independent dcd files,



Dear VMD users,

I have two independent dcd files containing dummy atoms and I want to merge them. In fact, they are parts of the same trajectory file. I extracted them to do some processing(translating species to new coordination). Now, I want to combine them into a new trajectory.

I used catdcd plugin(I already searched in vmd mailing list) but I have problem with running catdcd. I got this error:



wrong # args: should be "catdcdList dcdFileNames outFile indexFile stride"


It means that I have no catdcd pluging? I downloaded the binary catdcd but I do not know how I can use binaries to add as vmd plugin.

Is there another way to do it without using catdcd?

I will appreciate any helps.


Aliasghar Alizadeh-Mojarad