I am consuming PI web service and using GetPIArchiveData operation.
I found few errors codes:
Is there any detail documentation on all possible error codes and descriptions?
The first and last errors are explained in great lengths in the "Troubleshooting" chapter of the PI Web Services User Guide.
For the PI Point not found error you are getting, it seems like you did not replace the "servername" part with an actual server name.
For the invalid time error, I suggest you look at the "Timestamps" section of the Introduction, in the PI Web Services User Guide.
Retrieving data ...