Unable to write results of score model

Question

Hi all,
Trying to write the output from score model into writer gives this sometimes:
[ModuleOutput] DllModuleHost Error: 1 : Program::Main encountered fatal exception: Microsoft.Analytics.Exceptions.ErrorMapping+ModuleException: Error 0000: Internal error ---> System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.FormatException: The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters.
Module finished after a runtime of 00:00:01.2187968 with exit code -2
Module failed due to negative exit code of -2I've confirmed that the storage account is valid and I have the right keys.Anyone have the same problem?Regards,Jarrel

Answer 1

Without knowing anything about your data or what you are trying to do....
The error message is not due to an issue with user account and password. A quick Bing search indicates that it is most likely a problem with encryption/decryption of the data in the query string to SQL, or with data type conversions. For example, one answer
on the ASP.Net forum states that: "The usual reason for this error is, you are assigning Nvarchar value to varbinary or image type parameter and trying to insert the same in a Image type column in SQL"
Does the SQL table to which you are writing your data already exist, or are you letting the Writer module create the table for you? If you are letting the Writer create the table, it is probably making some incorrect assumptions about how to convert your
data to SQL types. For example, string -> nvarchar(50) and Byte[] -> nvarchar(4000). Try creating the table yourself (the Azure portal to SQL makes designing a table fairly easy) so that you control how your data is converted to SQL types. If you have
already created a table, double-check the types and make sure that they can handle the data you have.
Hope that helps.