Message type: E = Error
Message class:  CNV_00001 - Message class for CWB settings maintenance programs 
Message number: 526
Message text: Package &1 or phase &2 not active. Only display possible.
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The SAP error message CNV_00001526 indicates that a specific package or phase in a conversion process is not active, and as a result, the system can only display possible options rather than executing the conversion. This error typically arises in the context of data migration or system conversion processes, particularly when using SAP's tools for data migration, such as the SAP S/4HANA Migration Cockpit or other conversion tools.
Cause: Inactive Package/Phase: The specified package (&1) or phase (&2) is not active in the system. This could be due to: The package or phase not being properly configured or activated. The migration or conversion process not being fully set up. A prerequisite step not being completed, which is necessary for the activation of the package or phase.
Configuration Issues: There may be issues in the configuration settings that prevent the package or phase from being recognized as active. Version Compatibility: The version of the SAP system or the
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