You get this error when compiling your application.
The server tag XXX is ambiguous. Please modify the associated registration that is causing ambiguity and pick a new tag prefix.
This error occurs when two or more Infragistics releases (versions) have been used, or mixed, within your application.
Step 1: Go to your application’s \bin folder.
Step 2: Make sure all the Infragistics DLLs in the \bin folder belong to a particular release of Infragistics. Delete other Infragistics DLL versions from the Bin folder.
Step 3: In Iron Speed Designer, open the application and reconfigure all Infragistics controls. When reconfiguring, please make sure to select DLLs that belong to same Infragistics release.
Part VII: Troubleshooting Applications
Application Generation and Compilation Error Messages