Transactional replication error

Hi

I am setting up a snapshot for transactional replication but when I try to create a push subcription, the snapshot agent runs as usual but this time it stops after completing some objects - the error is: 'The process could not bulk copy out of table '[dbo].[syncobj_0x3146383635363835]'. The step failed.'

All distribution jobs are disabled.

Anyone know what is causing this?
Thanks