Build Target is not happening. It is showing Target not Created

hello, i am using keil uvision4 version. and when i try to build the target of a new uvision project, it is showing that "target not created" and an error has occured. i cannot build any of my projects...
Build Target is not happening. It is showing Target not Created

hello, i am using keil uvision4 version. and when i try to build the target of a new uvision project, it is showing that "target not created" and an error has occured. i cannot build any of my projects...
TARGET NOT CREATED

This is the error message: *** Using Compiler 'V5.06 update 6 (build 750)', folder: 'C:\Keil_v5\ARM\ARMCC\Bin' Build target 'Target 1' linking... .\Objects\pro.axf: Error: L6218E: Undefined symbol...
Target not created

I done with cortex-m3 in keil.. I edited some part in timer example program. While compiling no errors and warnings. But while building it is displaying as Target not created. Please help me.
target not created

Hi facing problem while using lpc2128 board, keil arm compiler. when i build the project WARNING L23:UNRESOLVED EXTERNAL SYMBOLS ERROR L128: REFERENCE MADE TO UNRESOLVED SYMBOL: EXTInt_serve1...