Message type: E = Error
Message class:  CNV_PE_CHECK_V2 - Check Messages (Version 2020) 
Message number: 104
Message text: Trans. opt. &1, step &2, par. &3: Fixed value is not provided
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.
First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).
Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.
You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.
The SAP error message CNV_PE_CHECK_V2104 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that a required fixed value for a specific parameter is missing in the configuration or mapping settings.
Cause: The error message is triggered when: A mandatory fixed value is expected for a specific parameter in the migration process, but it has not been provided. The configuration for the data migration does not include a necessary value that the system requires to proceed with the operation.
Solution: To resolve the error CNV_PE_CHECK_V2104, you can follow these steps: Check the Migration Settings: Review the migration or conversion settings in the SAP system. Ensure that all required parameters are correctly configured and that no mandatory fields are left blank. Identify the Missing Fixed Value: Look at the details provided in the error message, particularly the transaction option (&1), step (&2), and parameter (&3). This
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_PE_CHECK_V2103 Trans. opt. &1, step &2, par. &3: No field mapping allowed (link field)
What causes this issue?  Field &V3& is assigned as a link field to another transfer step parameter. <ZH>No</> field mapping for li...
CNV_PE_CHECK_V2102 Trans. opt. &1, step &2, par. &3: No structure mapping for &4 exists
What causes this issue?  Field mapping for parameter &V3& exists. However, there is <ZH>no</> structure mapping for &V4&. ...
CNV_PE_CHECK_V2105 Trans. opt. &1, step &2, par. &3: Fixed value &4 is not allowed
What causes this issue?  Field mapping of transfer step parameter &V3& has one of the following formats: Transfer step parameter &V3& ...
CNV_PE_CHECK_V2106 Trans. opt. &1, step &2, par. &3: Fixed value &4 is not compatible
What causes this issue?  Field mapping of transfer step parameter &V3& has one of the following formats: Transfer step parameter &V3& ...
Click on this link to search all SAP messages.