I have a problem with compiling PIC18 demo files. Could anyone can help me ?  -——————————————————————— Release build of project `G:elekRTOSFreeRTOS_V5.1.2FreeRTOSDemoPIC18_MPLABrtosdemo1.mcp’ started. Wed Feb 18 14:59:47 2009 -——————————————————————— Clean: Deleting intermediary and output files. Clean: Deleted file "G:elekRTOSFreeRTOS_V5.1.2FreeRTOSSourcetasks.o". Clean: Deleted file "G:elekRTOSFreeRTOS_V5.1.2FreeRTOSSourcequeue.o". Clean: Deleted file "G:elekRTOSFreeRTOS_V5.1.2FreeRTOSSourcelist.o". Clean: Deleted file "G:elekRTOSFreeRTOS_V5.1.2FreeRTOSSourceportableMPLABPIC18Fport.o". Clean: Deleted file "G:elekRTOSFreeRTOS_V5.1.2FreeRTOSDemoCommonMinimalPollQ.o". Clean: Deleted file "G:elekRTOSFreeRTOS_V5.1.2FreeRTOSDemoPIC18_MPLABmain1.o". Clean: Deleted file "G:elekRTOSFreeRTOS_V5.1.2FreeRTOSDemoPIC18_MPLABParTestParTest.o". Clean: Deleted file "G:elekRTOSFreeRTOS_V5.1.2FreeRTOSDemoPIC18_MPLABserialserial.o". Clean: Deleted file "G:elekRTOSFreeRTOS_V5.1.2FreeRTOSDemoCommonMinimalinteger.o". Clean: Deleted file "G:elekRTOSFreeRTOS_V5.1.2FreeRTOSSourceportableMemMangheap_1.o". Clean: Deleted file "G:elekRTOSFreeRTOS_V5.1.2FreeRTOSDemoPIC18_MPLABrtosdemo1.mcs". Clean: Done. Executing: "C:MCC18binmcc18.exe" -p=18F452 /i"." -I".include" -I"..include" -I"..\..include" -I"..\..\..include" -I"..\..Sourceinclude" -I"..\..\..Sourceinclude" -I"..DemoPIC18_MPLAB" -I"..\..\..DemoPIC18_MPLAB" -I"..\..\..\..DemoPIC18_MPLAB" -I"C:DevtoolsMicrochipMCC18h" -I"..Commoninclude" -I"..\..Commoninclude" "tasks.c" -fo="tasks.o" -w3 -DMPLAB_PIC18F_PORT -Ls -Opa- -nw 2074 -nw 2066 Executing: "C:MCC18binmcc18.exe" -p=18F452 /i"." -I".include" -I"..include" -I"..\..include" -I"..\..\..include" -I"..\..Sourceinclude" -I"..\..\..Sourceinclude" -I"..DemoPIC18_MPLAB" -I"..\..\..DemoPIC18_MPLAB" -I"..\..\..\..DemoPIC18_MPLAB" -I"C:DevtoolsMicrochipMCC18h" -I"..Commoninclude" -I"..\..Commoninclude" "queue.c" -fo="queue.o" -w3 -DMPLAB_PIC18F_PORT -Ls -Opa- -nw 2074 -nw 2066 Executing: "C:MCC18binmcc18.exe" -p=18F452 /i"." -I".include" -I"..include" -I"..\..include" -I"..\..\..include" -I"..\..Sourceinclude" -I"..\..\..Sourceinclude" -I"..DemoPIC18_MPLAB" -I"..\..\..DemoPIC18_MPLAB" -I"..\..\..\..DemoPIC18_MPLAB" -I"C:DevtoolsMicrochipMCC18h" -I"..Commoninclude" -I"..\..Commoninclude" "list.c" -fo="list.o" -w3 -DMPLAB_PIC18F_PORT -Ls -Opa- -nw 2074 -nw 2066 Executing: "C:MCC18binmcc18.exe" -p=18F452 /i"." -I".include" -I"..include" -I"..\..include" -I"..\..\..include" -I"..\..Sourceinclude" -I"..\..\..Sourceinclude" -I"..DemoPIC18_MPLAB" -I"..\..\..DemoPIC18_MPLAB" -I"..\..\..\..DemoPIC18_MPLAB" -I"C:DevtoolsMicrochipMCC18h" -I"..Commoninclude" -I"..\..Commoninclude" "port.c" -fo="port.o" -w3 -DMPLAB_PIC18F_PORT -Ls -Opa- -nw 2074 -nw 2066 Executing: "C:MCC18binmcc18.exe" -p=18F452 /i"." -I".include" -I"..include" -I"..\..include" -I"..\..\..include" -I"..\..Sourceinclude" -I"..\..\..Sourceinclude" -I"..DemoPIC18_MPLAB" -I"..\..\..DemoPIC18_MPLAB" -I"..\..\..\..DemoPIC18_MPLAB" -I"C:DevtoolsMicrochipMCC18h" -I"..Commoninclude" -I"..\..Commoninclude" "PollQ.c" -fo="PollQ.o" -w3 -DMPLAB_PIC18F_PORT -Ls -Opa- -nw 2074 -nw 2066 Executing: "C:MCC18binmcc18.exe" -p=18F452 /i"." -I".include" -I"..include" -I"..\..include" -I"..\..\..include" -I"..\..Sourceinclude" -I"..\..\..Sourceinclude" -I"..DemoPIC18_MPLAB" -I"..\..\..DemoPIC18_MPLAB" -I"..\..\..\..DemoPIC18_MPLAB" -I"C:DevtoolsMicrochipMCC18h" -I"..Commoninclude" -I"..\..Commoninclude" "main1.c" -fo="main1.o" -w3 -DMPLAB_PIC18F_PORT -Ls -Opa- -nw 2074 -nw 2066 Executing: "C:MCC18binmcc18.exe" -p=18F452 /i"." -I".include" -I"..include" -I"..\..include" -I"..\..\..include" -I"..\..Sourceinclude" -I"..\..\..Sourceinclude" -I"..DemoPIC18_MPLAB" -I"..\..\..DemoPIC18_MPLAB" -I"..\..\..\..DemoPIC18_MPLAB" -I"C:DevtoolsMicrochipMCC18h" -I"..Commoninclude" -I"..\..Commoninclude" "ParTest.c" -fo="ParTest.o" -w3 -DMPLAB_PIC18F_PORT -Ls -Opa- -nw 2074 -nw 2066 Executing: "C:MCC18binmcc18.exe" -p=18F452 /i"." -I".include" -I"..include" -I"..\..include" -I"..\..\..include" -I"..\..Sourceinclude" -I"..\..\..Sourceinclude" -I"..DemoPIC18_MPLAB" -I"..\..\..DemoPIC18_MPLAB" -I"..\..\..\..DemoPIC18_MPLAB" -I"C:DevtoolsMicrochipMCC18h" -I"..Commoninclude" -I"..\..Commoninclude" "serial.c" -fo="serial.o" -w3 -DMPLAB_PIC18F_PORT -Ls -Opa- -nw 2074 -nw 2066 Executing: "C:MCC18binmcc18.exe" -p=18F452 /i"." -I".include" -I"..include" -I"..\..include" -I"..\..\..include" -I"..\..Sourceinclude" -I"..\..\..Sourceinclude" -I"..DemoPIC18_MPLAB" -I"..\..\..DemoPIC18_MPLAB" -I"..\..\..\..DemoPIC18_MPLAB" -I"C:DevtoolsMicrochipMCC18h" -I"..Commoninclude" -I"..\..Commoninclude" "integer.c" -fo="integer.o" -w3 -DMPLAB_PIC18F_PORT -Ls -Opa- -nw 2074 -nw 2066 Executing: "C:MCC18binmcc18.exe" -p=18F452 /i"." -I".include" -I"..include" -I"..\..include" -I"..\..\..include" -I"..\..Sourceinclude" -I"..\..\..Sourceinclude" -I"..DemoPIC18_MPLAB" -I"..\..\..DemoPIC18_MPLAB" -I"..\..\..\..DemoPIC18_MPLAB" -I"C:DevtoolsMicrochipMCC18h" -I"..Commoninclude" -I"..\..Commoninclude" "heap_1.c" -fo="heap_1.o" -w3 -DMPLAB_PIC18F_PORT -Ls -Opa- -nw 2074 -nw 2066 Couldn’t locate build tool.  Check tool locations. -——————————————————————— Release build of project `G:elekRTOSFreeRTOS_V5.1.2FreeRTOSDemoPIC18_MPLABrtosdemo1.mcp’ failed. Wed Feb 18 14:59:50 2009 -——————————————————————— BUILD FAILED

MPLAB saves the path to tools in the project. It looks like the path is wong in your project. You can set the paths through the MPLAB menu.