proc json - some code points did not transcode

Created by: allanbowe

ERROR: Some code points did not transcode.
MPRINT(MP_JSONOUT):   run;
ERROR: The JSON writer is in an error state at this point and no more items may be inserted.
ERROR: Due to the previous error, the JSON output file is incomplete and invalid, or in some cases, unable to be created. If created, the JSON output file is retained so that you can review it to help determine the cause of the error.

The above error is typically seen when proc json tries to export a non valid character. We implemented proc json in the sasjs/adapter for speed however this instability is affecting data controller and so we must switch back to the trusty data step.