Another time I got this same error when I had a typo in a field name, making the message appear completely arbitrary.

That took a while to find since I had over 25 fields to review. In one instance, this error was received when the data in the field was longer than the field definition. I have heard this process described as “black box”, but I think a more accurate description would be a punch card computer, as black box is too cool of a name for a process this heinous.

Metaphorically, I had to wait for my punch cards to be read through the machine to see if I had correctly guessed what might be wrong.

Generally speaking these errors were found after the first few things I tried did not work. I was able to resolve this error a few times by resolving different reasons why the error might have occurred by looking through the code and guessing at what line could possibly have caused the error. I didn’t get any results to discard, so that helpful hint was not applicable, ever. The results, if any, should be discarded. A severe error occurred on the current command. Error message from database execution : The service has encountered an error processing your request. Here’s an example.ĭatabase operation failed on server ‘Sink:’ with SQL Error Number ‘40197’. All of the errors show up at the end and provide very little insight as to what in the process failed. Unfortunately, while developing Data Factory I became very familiar with errors. Debugging Data Factory harkens back to day when people lined up punch cards and waited to get the output at the other side. Data Factory doesn’t provide a way to really determine what is going on internally when the code is running. perform any of the standard set of troubleshooting techniques which are used in other languages to help resolve errors. In those languages one can step through the code and look at the variables or values while the code is running. Data Factory is different from most other programming languages which you may be familiar with, such as C#, Java, R, SSIS or VB. If you have been reading my Blog Series on Data Factory, you will notice that I didn’t talk about what to do when you have errors, until now. Punch card and punch card reading machine

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