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Rxlib installation message unable to locate dpl file

Problem: I'm trying to install Rx Library into Delphi 3, 4 or C++Builder 3 IDE. Everything goes right, after installing I can use components and compile demo projects. The problem starts when I close Delphi and run again. Then I get error message saying that Delphi was unable to locate a file required for each of the component packages. Solution: You must put compiled RX Library runtime packages Delphi 3 - DPL files - RXCTL.DPL, RXTOOLS.DPL, RXDB.DPL Delphi 4 - BPL files - RXCTL4.BPL, RXDB4.BPL C++Builder 3 - BPL files - RXCTL.BPL, RXDB.BPL into directory that is accessible through the search PATH (i.e. DOS %PATH% environment variable; for example, in the Windows\System directory).