Replication Publication issue

Hi All-
We are seeing some issue with publication
When i launch replicaiton monitor, i see that status of pulications is 'Retrying failed command'
And when i look under the Agent Tab, and open the job snapshot agent which has a status 'Retrying failed command', the last action message is below. Can anyone guide how to fix this issue?

Message: There is not enough space on the disk.
Stack: at Microsoft.SqlServer.Replication.Snapshot.SqlServer.NativeBcpOutProvider.ThrowNativeBcpOutException(CConnection* pNativeConnectionWrapper)
at Microsoft.SqlServer.Replication.Snapshot.SqlServer.NativeBcpOutProvider.BcpOut(String strBcpObjectName, String strBcpObjectOwner, String strBaseBcpObjectName, Boolean fUnicodeConversion, String strDataFile, String strLoadOrderingHint, String strWhereClause, Boolean useTableLockHint, Int32 bcpFileFormatVersion)
at Microsoft.SqlServer.Replication.Snapshot.SqlServer.BcpOutThreadProvider.DoWork(WorkItem workItem)
at Microsoft.SqlServer.Replication.WorkerThread.NonExceptionBasedAgentThreadProc()
at Microsoft.SqlServer.Replication.AgentCore.BaseAgentThread.AgentThreadProcWrapper() (Source: MSSQLServer, Error number: 0)
Publication Type: Transactional
Thanks
Anita