I would like help with a dos batch file program that renames multiple filenames of 8 characters long to filenames of 7 characters long without changing the last four characters. e.g 00070011.rrt should be: BCX0011.rrt 00070012.rrt should be: BCX0012.rrt 00070013.rrt should be: BCX0013.rrt ..and so on. the script should actually remove the first zero in the filenames as in the example. Thanx in advance

The following script achieves your wishes: @Echo Off For %%A in (%~f1\*.rrt) Do Call :REN %~f1 %%A GoTo :EOF :REN Set File=%~nx2 Ren %~f1\%File% BCX%File:~4% GoTo :EOF To run save it as XRen.bat then type XRen Folder_Name where Folder_Name is the directory holdings your rrt files to be renamed (the directory's name must not have embedded spaces). By the way that is a NT-batch as Win NT/2K/XP have no DOS at all and the prompt is actually the NT-system console while DOS is emulated by NTVDM (DOS Virtual Machine).

Sorry, but after a more deeper test replace For %%A in (%~f1\*.rrt) Do Call :REN %~f1 %%A with For %%A in (%~f1\0*.rrt) Do Call :REN %~f1 %%A to avoid unwanted side effects.