Uploading my program don't work not anymore

Hallo,

I'm a beginner with an Arduino Uno. I wrote a little program and uploaded it. So I did with several modifications of this program and some very small testingprograms. But the error massages during the uploads were more and more. Now uploading is impossible, but the program in the Uno runs and runs, not completely correct but is runs.

I read this information but I have not idea what to do now:

https://www.arduino.cc/en/Guide/Troubleshooting#upload

This are the error messages:

avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x86 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x86 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x86 avrdude: stk500_recv(): programmer is not responding Problem beim Hochladen auf das Board. Hilfestellung dazu unter http://www.arduino.cc/en/Guide/Troubleshooting#upload. avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x86 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0x86 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0x86 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0x86 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0x86 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0x86 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x86

The operating system in my PC is WIN 10

Can help somebody?

regards

Hallo,

the problem was: during upload there was a connection PIN 0 to GND!!

regards

freduino13