Message type: E = Error
Message class:  FM_BP_BWRET - Messages for FM Budget Preparation Retraction 
Message number: 000
Message text: The BW system &1 is not available at the moment
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 FM_BP_BWRET000 indicates that the BW (Business Warehouse) system specified is currently not available. This can occur for various reasons, and understanding the cause is essential for troubleshooting and resolving the issue. Possible Causes: System Downtime: The BW system may be undergoing maintenance or is temporarily down for updates. Network Issues: There could be network connectivity problems between the SAP system and the BW system.
Configuration Issues: Incorrect configuration settings in the SAP system or BW system can lead to connectivity problems. Authorization Issues: The user may not have the necessary authorizations to access the BW system. System Overload: The BW system might be overloaded with requests, causing it to be unresponsive. Transport Issues: If there are recent transports or changes made to the BW system, they might have caused instability. Solutions: Check System Status: Verify if the BW system is up and running. You can do this by checking the system logs or contacting the
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
FMUP250 Goods receipt (&1) in wrong fiscal year (&2). Current FiscYear (&3)
What causes this issue?  You are trying to reduce the goods receipt (<(>&<)>1) in Funds Management by using a document (for example, b...
FMUP224 FI document could not be read back from archive &1 &2 &3
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FM_BP_BWRET001 Query &1 Contains No Data
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FM_BP_BWRET002 Create number range &1 for the plan data transfer
What causes this issue?  The number range has not been created for the plan data transfer or the cancellation of plan data transfer from the BW system...
Click on this link to search all SAP messages.