Message type: E = Error
Message class:  KZ - Cost Object Repetitive Mfg / Process Mfg 
Message number: 012
Message text: No text exists in language &
No long text exists in language: &v1&.
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 KZ012 ("No text exists in language &") typically indicates that the system is trying to access a text or description in a specific language, but there is no entry available for that language in the relevant table or configuration.
Cause:
Missing Language-Specific Text: The most common cause is that the text for the specified language has not been maintained in the relevant master data or configuration settings.
Incorrect Language Settings: The user’s language settings may not match the available texts in the system.
Data Migration Issues: If data has been migrated from another system, some language texts may not have been transferred correctly.
Custom Development: If there are custom programs or enhancements, they may not have been properly configured to handle multiple languages.
Solution:
Maintain Texts: 
Go to the relevant transaction (e.g., for material master, you would use MM01/MM02) and check if the text for the specified language exists. If not, you can Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
KZ011 & & deleted
What causes this issue?  The master data of &v1& &v2& was deleted.System Response  The system issues an error message and will not all...
KZ010 You cannot delete cost object &
What causes this issue?  <DS:GLOS.cost_object_ID>Cost object ID</> &v1& cannot be deleted because: Actual costs have already been ...
KZ013 System error when object numbers generated for cost object &
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
KZ014 No long text exists for & &
What causes this issue?  No long text exists for &v1& &v2&.System Response  The system issues an error message and will not allow you ...
Click on this link to search all SAP messages.