MPLABX Compiler Error

[pierrestemmett]

I am getting this error in the output of the XC8 v1.45 compiler in MPLABX.
Please will you advise me on how to fix it?

:0: error: (500) undefined symbols:
_pow10(dist/default/production\SmartEVSE2.X.production.obj) _crc16(dist/default/production\SmartEVSE2.X.production.obj) _checkbootloader(dist/default/production\SmartEVSE2.X.production.obj) _ease8InOutQuad(dist/default/production\SmartEVSE2.X.production.obj) _triwave8(dist/default/production\SmartEVSE2.X.production.obj)
(908) exit status = 1

make[2]: Leaving directory 'C:/Users/User/smartevse/version2/SmartEVSE2.X'
make[1]: Leaving directory 'C:/Users/User/smartevse/version2/SmartEVSE2.X'
make[2]: *** [nbproject/Makefile-default.mk:149: dist/default/production/SmartEVSE2.X.production.hex] Error 1
make[1]: *** [nbproject/Makefile-default.mk:91: .build-conf] Error 2
make: *** [nbproject/Makefile-impl.mk:39: .build-impl] Error 2

BUILD FAILED (exit value 2, total time: 32s)

[mstegen]

I'm using XC8 v2.10 now on the latest version. But i think i did not upload the whole project.
The latest version (v2.17) should compile without errors.