Sometimes is good to debug directly on the client computer, because the development computer does not have the problem. Of course, in such cases is not appropriate (and often not even possible) to install Delphi on the client computer and for this cases Delphi offer the possibility of remote debugging. How to do?

I show remote debugging on Delphi 2010 (service pack 4 and 5 required - fixed some problems), but remote debugging is supported on old Delphi too - only difference is filenames (see below).

In first step install debugger support on target computer. You can download remote debugging support from Embarcadero or from Delphi directory copy this files (for Delphi 2010 - Delphi version 14, so for another version please use proper files - maybe can be stability problem with Delphi 2005 or 2006).

bccide.dll bordbk140.dll bordbk140N.dll comp32x.dll DCC140.dll rmtdbg140.exe 

Now register files with:

regsvr32 bordbk140.dll regsvr32 bordbk140n.dll 

Ok, so necessary tasks are done (this can be necessary only for first time) and start debugging.

On target computer start remote debugger (rmtdbg140.exe) - when started small icon is showed in tray (green bug).

Now on project enable Remote debug symbols and Debug information. With first option compiler will create RSM files during compilation.

Compiled binary file with rsm files copy on client computer. In menu Run select Load Process …

… and in Remote tab fill fields (see screenshot - directories are from target computer).

Now only click on Load and if everything is good, program will stop on first line of program (probably on first line in dpr file) and you can set breakpoints or everything like during normal debugging. And this is all.

When problems with communication try for example ping (and check firewall or stupid anti viruses and so on).

Update: simple demo - download