Failure during 2 backup jobs for one database I have 2 jobs for one database.  One does a full backup every hour.  The other one is a transaction log backup every 15 minutes.

I've checked the job history.   It shows some failures at 16:00.  The detail is as follows: 



Does that mean that 2 jobs can't run at the same time? 

The error detail is: 


  Message Executed as user: NT SERVICE\SQLSERVERAGENT.
  Cannot open backup device 'D:\Program Files\Microsoft SQL Server\MSSQL13.MSSQLSERVER\MSSQL\Backup\AdventureWorksLT_from_Azure.bak'.
  Operating system error 32(The process cannot access the file because it is being used by another process.).
  [SQLSTATE 42000] (Error 3201) BACKUP LOG is terminating abnormally.
  [SQLSTATE 42000] (Error 3013). The step failed.'


Could you please help me for that?
There are two possibilities that come to mind:
 1. The full backup and the transaction log backup are trying to use the same file.


  'D:\Program Files\Microsoft SQL Server\MSSQL13.MSSQLSERVER\MSSQL\Backup\AdventureWorksLT_from_Azure.bak'



Something else is locking the file i.e. tape backup 
I have had tape backups cause this problem for me. I had to wait until the tape backup finished then my SQL Agent backup job would work.