Downloading problem with Keil uVision3 (JTAGjet USB emulator not found)

Tonight I had a weird problem setting up the development board at home. After installing the evaluation version of Keil uVision3 I tried downloading the Blinky demo program into the dev board. This resulted in the following error message :

At first I thought this problem could have several reasons :

• I’m running Windows Vista
• In uVision’s output window the following was mentioned “*** Error: ‘C:\Keil\ARM\Signum\SigUV3Arm.dll’ invalid peripheral driver”, so I though it might have been a driver issue with Vista
• I had previously download a program interfering with the JTAG pins (Which I ruled out after switching to SW-interface, which didn’t work either)

Eventually I stumbled accros this thread at the Keil forum. Apparently this is some freaky bug in uVision. If you create a new project, reselect the right target device and import all source files it works just fine. The weird thing is that it didn’t occur when I installed uVision on the workstation I had available at my internship…

Oh well, I’m just glad I got it fixed…