Write selected topology to file.

parmwrite out <filename> [{parm <name> | parmindex <#> | <#> | crdset <setname>}] [<fmt>] [nochamber]

<filename> File to write to.
[parm <name> | parmindex <#> | <#>] Topology to write out.
[crdset <setname>] Write topology from specified COORDS data set.
[<fmt>] Format keyword. If not specified the file name extension will be used. Default is Amber Topology.
[nochamber] (Amber topology only) Remove any CHAMBER information from the topology.

Write out specified topology (first topology loaded by default) to <filename> with format <fmt> (Amber topology if not specified). Note that the Amber topology format is the only fully supported format for topology writes.