Debugging Replication Errors

use distribution
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select top 100 e.*, * from MSrepl_commands c inner join MSrepl_errors e on c.xact_seqno =e.xact_seqno order by e.id desc
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exec sp_replmonitorhelpsubscription @publisher=NULL, @publication_type=0 
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exec sp_helpdistpublisher 
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exec distribution..sp_replmonitorsubscriptionpendingcmds @publisher=pubservername, @subscriber=subservername, @publisher_db='pubdbname', @subscriber_db='subdbname', @publication='pubname', @subscription_type=0 
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exec sp_replqueuemonitor @publisher = pubservername, @publisherdb = 'pubdbname', @publication = 'pubname', @tranid = NULL, @queuetype = 0 
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exec sp_replshowcmds