old PDB structure error

Hello all,

I have a pdb file which is not in standard format, I can read it by pdbread function but when I want to convert it to standard form by pdbwrite, I get the error " old PDB structure" . I found this m file : sbpl.net:8080/shared/Brian/quad init load/opt/matlab/toolbox/bioinfo/proteins/private/convertpdbstruct.ma

but when I use it the error " too many arguments" comes up although I just enter the old pdb file's name. Could anyone help me with this problem please?

Thank you in advance.