Message type: E = Error
Message class:  /SMB/TRANSP_INFRA -  
Message number: 226
Message text: Previous correction/upgrade solutions not activated, start new activation
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 /SMB/TRANSP_INFRA226 Previous correction/upgrade solutions not activated, start new activation typically indicates that there are pending corrections or upgrade solutions that have not been activated in the SAP system. This can occur during the transport of changes or when trying to apply new corrections or upgrades.
Cause: Pending Activations: There are previous transport requests that have not been fully activated. This can happen if a transport request was imported but not activated, or if there are dependencies that need to be resolved first. Transport Layer Issues: There may be issues with the transport layer configuration or the transport directory. System State: The system may be in a state where it cannot proceed with new activations due to existing unactivated changes.
Solution: To resolve this error, you can follow these steps: Check for Pending Requests: Use transaction code SE01 or SE09 to check for transport requests that are in the "modification" or "released" state but not
Get instant SAP help. Sign up for our Free Essentials Plan. 
/SMB/TRANSP_INFRA225 -> Importing Solution &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/SMB/TRANSP_INFRA224 Deleting Solution &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/SMB/TRANSP_INFRA227 -> Transport Request &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/SMB/TRANSP_INFRA228 Content Category: &1
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.