Message type: E = Error
Message class:  MI - Customizing for the Material Master 
Message number: 577
Message text: Select a sortable column
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The SAP error message MI577, which states "Select a sortable column," typically occurs in the context of using the SAP GUI or SAP Fiori applications when trying to sort data in a table or list. This error indicates that the column you are attempting to sort is not sortable, which can happen for various reasons.
Cause: Non-Sortable Column: The column you are trying to sort may not be defined as sortable in the underlying data model or configuration. Technical Restrictions: Some columns may contain complex data types or calculated fields that do not support sorting. User Permissions: In some cases, user permissions may restrict sorting capabilities on certain columns. Data Structure: The data structure or the way the data is retrieved may not allow sorting on specific columns.
Solution: Select a Different Column: Try selecting a different column that is known to be sortable. You can usually identify sortable columns by looking for sorting icons or indicators
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