Message type: E = Error
Message class:  CRM_MKTTG_BW_RSDRCRM - Message Mapping from RSDRCRM_SEG in BWA 
Message number: 301
Message text: QSI exists for QueryProvider: &1
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 CRM_MKTTG_BW_RSDRCRM301 with the description "QSI exists for QueryProvider: &1" typically indicates that there is an issue related to the Query Provider in the SAP CRM system, particularly in the context of data extraction or reporting in SAP BW (Business Warehouse).
Cause: Query Provider Issues: The error suggests that there is a Query Structure Interface (QSI) that exists for the specified Query Provider, which may not be properly configured or may have inconsistencies. Data Source Configuration: There could be issues with the data source configuration in the BW system, such as missing or incorrect settings. Transport Issues: If the Query Provider was recently transported from one system to another, there may be inconsistencies or missing objects. Authorization Issues: Sometimes, the user may not have the necessary authorizations to access the Query Provider or the underlying data.
Solution: Check Query Provider Configuration: Go to the transaction code RSA1 in the BW system and check the
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CRM_MKTTG_BW_RSDRCRM300 *** Messages for TA RSDRCRM_SEG_QSI (301 - 329, 300 universal ) ***
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CRM_MKTTG_BW_RSDRCRM253 Segment &1: fulfillment figure &2 incorrect; &3 is expected
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CRM_MKTTG_BW_RSDRCRM302 QSI does not exist for QueryProvider: &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CRM_MKTTG_BW_RSDRCRM303 Enter a query name
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.