The transaction log for database 'dbname' is full. To find out why space in the log cannot be reused, see the log_reuse_wait_desc column in sys.databases

The transaction log for database 'dbname' is full. To find out why space in the log cannot be reused, see the log_reuse_wait_desc column in sys.databases

Issue:
InnerException: System.Data.SqlClient.SqlException (0x80131904): The transaction log for database 'dbname' is full. To find out why space in the log cannot be reused, see the log_reuse_wait_desc column in sys.databases


Analysys:

The issue says that the transaction log has reached its configured size or disk does not have sufficient space. , so we need to make space.

Solution 1:

Clear the log file and freeing disk space

Use [dbname]

Find log file name using below query and pass it in DBCC SHRINKFILE query 
Select * from sys.database_files

ALTER DATABASE [dbname] SET RECOVERY SIMPLE

DBCC SHRINKFILE ('dbname_Log', 1)

Solution 2:

Move log file on another drive

Please follow steps mentioned in below article,
http://anrorathod.blogspot.com/2018/02/how-to-move-or-change-datamdf-file-or.html

For more information you can refer, 

Troubleshoot a Full Transaction Log (SQL Server Error 9002)


https://docs.microsoft.com/en-us/sql/relational-databases/logs/troubleshoot-a-full-transaction-log-sql-server-error-9002?view=sql-server-2017

Hope this will help you and save your time.

Enjoy !!!

:)