SQL Server Error 25603, Severity 17 typically signifies a resource-related issue that impacts database operations. This problem is associated with insufficient system resources such as memory, disk space, or CPU availability on the SQL Server instance.  A severity level of 17 indicates that the error is related to software or hardware limitations that prevent the proper execution of database queries or processes. These errors usually result from underlying environmental constraints rather than an issue in your T-SQL code.

Common causes: 

• Memory Pressure: Insufficient available memory for query processing due to poorly configured resource allocation settings.
• Disk Space Issues: Lack of free storage space needed for tempdb growth or log file expansion.
• CPU Overload: Heavy workload may overwhelm server capacity limits and could cause degraded performance.
• Configuration Errors: Improperly tuned settings such as `max server memory`, paging file size mismanagement (on Windows OS), etc., might inadvertently create bottlenecks.