How To Fix GW777 - Conversion error with network format <-> internal format

SAP Error Message - Details

• Message type: E = Error

• Message class: GW - Message Texts for Gateway

• Message number: 777

• Message text: Conversion error with network format <-> internal format

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message GW777 - Conversion error with network format <-> internal format ?

  The SAP error message GW777 indicates a conversion error between the network format and the internal format. This typically occurs in the context of SAP Gateway services, where data is being transferred between the SAP system and external systems or clients. The error can arise due to various reasons, including data type mismatches, incorrect formatting, or issues with the data being sent or received.
  Causes of GW777 Error
  
  
  Data Type Mismatch: The data being sent from the client does not match the expected data type in the SAP system. For example, sending a string where a date is expected.
  
  
  Incorrect Formatting: The format of the data being sent may not conform to the expected format. For instance, date formats (e.g., DD/MM/YYYY vs. MM/DD/YYYY) or numeric formats (e.g., decimal separators).
  
  
  Encoding Issues: There may be issues with character encoding, especially if special characters are involved.
  
  
  Null or Empty Values: Sending null or empty values for fields that require data can also trigger this error.
  
  
  Version Mismatch: If there is a mismatch between the versions of the SAP Gateway and the client application, it may lead to conversion errors.
  
  
  Solutions to GW777 Error
  
  
  Check Data Types: Ensure that the data types being sent from the client match the expected data types in the SAP system. Validate the data structure in the OData service.
  
  
  Validate Data Formats: Make sure that the data formats conform to the expected formats defined in the SAP system. This includes checking date formats, number formats, and string lengths.
  
  
  Review Character Encoding: Ensure that the character encoding used in the client application matches what is expected by the SAP Gateway. UTF-8 is commonly used.
  
  
  Handle Null Values: Ensure that all required fields are populated with valid data. If a field can be null, ensure that the SAP system is configured to handle null values appropriately.
  
  
  Check Service Metadata: Review the OData service metadata to ensure that the data being sent aligns with the service definition.
  
  
  Debugging: Use transaction codes like /IWFND/ERROR_LOG to check for detailed error logs that can provide more context about the issue.
  
  
  Update SAP Gateway: If there is a version mismatch, consider updating the SAP Gateway or the client application to ensure compatibility.
  
  
  Related Information
  
  SAP Notes: Check SAP Notes related to the GW777 error for any specific patches or updates that may address known issues.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and what solutions they found effective.
  Documentation: Review the official SAP documentation for OData services and SAP Gateway for best practices and troubleshooting tips.
  
  By following these steps, you should be able to identify the root cause of the GW777 error and implement an appropriate solution.