To make a message editable in Ensemble's Message Viewer and modify XML messages before resending, you should follow these steps:

1. Make a Message Editable in Message Viewer:

   • Use the "Edit and Resend" option available in the Message Viewer. This allows you to modify the contents of the message.
   • If you see that "Edit and Resend" is unavailable, there could be specific restrictions in place based on the class or namespace configuration. For example, messages that are custom classes using %XML.Adaptor or certain complex structures may not allow direct editing and resending [1][2].

2. Modify an XML Message Before Resending:

   • When you click “Edit and Resend” for an XML message, you'll be able to amend its content in a format similar to what is displayed. However, there may be cases where a lack of proper setup for messages or XML projection can cause issues with editing.
   • If editing is consistently unavailable, ensure that the properties within your Ensemble classes supporting the messages are properly configured as extendable and compatible with Ens.Message or %XML.Adaptor [1][2].

Additionally, note that merging lists, ensuring seamless resending and analyzing, involves configuring development settings accordingly and could potentially require code-level edits or additional debugging about why classes aren't exposing editable features.

If further customization or debugging is required, reviewing the configuration and class definitions might be necessary.

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To manage disk usage related to error logging in %SQL_Diag.Result and %SQL_Diag.Message, here are some possible approaches:

1. Limiting Redundant Logging:
   There are no specific mentions of built-in mechanisms in the documents retrieved to limit repeated logs or filter out redundant error messages in %SQL_Diag tables directly. However, you could achieve this via custom application logic or by introducing conditions around your LOAD DATA or SQL processes.

2. Data Cleanup:
   There isn’t a specific retention or automated cleanup mechanism for %SQL_Diag.Result and %SQL_Diag.Message. Such tables would likely require periodic manual or automated maintenance tasks, such as DELETE statements or archiving historical records.

3. Moving Tables to a Separate Database:
   Moving diagnostic tables to a separate database with storage limits is a viable strategy. This allows you to isolate and control the potential disk usage without impacting the primary database. Implementing this change might involve:

   • Redirecting the error logging functionality to use tables stored in the designated database.

4. Transaction Commands:
   While managing transactions should include commands like TStart and TCommit to ensure database integrity, these don't inherently affect logging configurations but do guarantee atomicity. Locking mechanisms could help manage concurrent operations during troubleshooting large batches [1].

5. SQL and ObjectScript Integration:
   For advanced operations based on requirements, ObjectScript commands and SQL functionality can be further customized and integrated.

Unfortunately, no direct system option or detailed guideline about controlling disk usage specifically for the %SQL_Diag tables and limiting repetitive entries is provided. Custom scripting and database management strategies will likely be required to achieve this goal.

Let me know if you need assistance with a specific implementation!

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To mark an HL7 NACK as "completed," ignoring an error without generating an alert, you can utilize the Reply Code Actions settings of the HL7 operation in the InterSystems platform. This involves customizing the Reply Code Actions string based on the specific NACK codes or conditions you want to handle differently.

Here are some relevant details for handling NACKs:

1. Default Reply Code Actions:
   The default Reply Code Actions is:

   ':?R=RF,:?E=S,:~=S,:?A=C,:*=S,:I?=W,:T?=C'
   

   It specifies actions for the different response codes received (e.g., AR, AE, CR, etc.) [1].

2. Customizing Reply Code Actions:
   To suspend messages with the specified error or mark them "Completed," you should update the Reply Code Actions string. For instance:

   AR=S,:?R=S,:?E=S,:~=S,:?A=C,:*=S,:I?=W,:T?=C
   

   In this example, NACKs with the "AR" in the MSA:1 segment would be matched and the message would be suspended, and other error conditions would follow the default behavior [1].

3. Use Conditional Matching:
   If you want to mark a message completed based on specific criteria in an error within the NACK, you can use text matching conditions. For example:

   E*Date of birth in PID.7 must not be empty=S,:?R=S,:?E=S,:I?=W,:T?=C
   

   This indicates that when a NACK contains the specified text in the error description, the message will be marked as "Suspended" or "Completed" with the action code S [2].

Make sure no extra spaces or unnecessary quotation marks are added around the action code string, as it could lead to errors during execution.

These updates to the Reply Code Actions string should achieve the desired functionality. If further customization is needed, extending the operation and overriding specific methods like OnReplyDocument() or OnGetReplyAction() may be required [3][4][2].

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