Message type: E = Error
Message class:  U9 - Message Class for Output in Application Log 
Message number: 517
Message text: Ressource not available
The following table contains a resource that was not entered in the
system.
Table / specific table key:
&1&2&3&4
Explanation of specific table key:
Plan Number ~ Operation ~ Activity ~ Mode ~ Capacity ~ ~ ~  or
Plan Number ~ Operation ~ Activity ~ Mode ~ ~ Resource ~ Location ~
Type
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message U9517, which states "Resource not available," typically indicates that a specific resource (such as a material, production resource, or other entity) is not available for the operation you are trying to perform. This error can occur in various contexts, such as during production planning, order processing, or resource allocation. Causes: Resource Unavailability: The resource you are trying to use (e.g., a machine, tool, or material) is not available due to maintenance, breakdown, or scheduling conflicts. Incorrect Configuration: The resource may not be properly configured in the system, leading to it being marked as unavailable. Capacity Issues: The resource may be at full capacity, and no additional operations can be scheduled. Material Shortage: If the resource is a material, it may not be in stock or may not have been properly procured. Authorization Issues: The user may not have the necessary permissions to access or use the resource. Solutions: Check Resource Availability: Verify the availability
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
U9516 Mode does not exist in table MODE
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
U9515 Primary resource does not exist in the system
What causes this issue?  The following table entry contains a primary resource that is not entered in the system. Table/specific table key: &1&...
U9518 Logical component is not available in table COMP
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
U9519 Material does not exist
What causes this issue?  The following table entry contains a material that was not entered in the system. Table / specific table key: &1&2&am...
Click on this link to search all SAP messages.