Play with IDOC :-)

Transactions to play with IDOC(s):
RBDAPP01 - change status for Inbound IDOC (yellow to green)
RSEOUT00 - Process all selected IDocs (EDI)
RSNAST00 - trigger idoc with output type.
RBDMIDOC - trigger change pointer (BD21)
RBDAGAIN (For Outbound) - Process Outbound IDOCs with Error Again
RBDMANI2 (For Inbound) - Manual Processing of IDOCs: Post IDOCs Not Yet Posted
                                                (Reprocess the failed IDOC)
RBDAGAI2 - Reprocess IDOCs after inbound ALE Error (BD84)
RSARFCEX - Execute Calls Not Yet Executed
RBDMOIND - Status Conversion with Successful tRFC Execution

(to change the idoc status from 30 to 03)

RBDMANIN - Start error handling for non-posted IDocs
RBDSTATE - Send Audit Confirmations
BD87 - IDoc reprocessing
WE19 – IDoc reprocessing
Edit the iDoc using WE02 ……
Outbound:
RBDAGAIN or T-Code BD87
This would push your Idoc from *02*(Error passing data to port) to 30(Idoc ready to dispatch) status.
Now to send the Idoc from 30 to *03*(Data passed to port OK) use the "RSEOUT00" program and run another job as stated above.
This would send the Idocs to 03.
Similarly at Inbound side: 
To reprocess an Idoc in 51 status:
Use program "RBDMANI2" and run a job.It will push Idocs from 51 to 53 status.
For 64 status use "RBDAPP01" program.
You can do it in transaction code BD87

IDOC STATUS:
For Inbound --
53 - Idoc Posted successfully
51 - Failed .(Can find the reason under the status in WE02 or from Table - EDIDS).
68 - This is basically failure status .This happens in between between 64 and 51. (From here also we can find the cause of failure). Sometime what happened that there we can see that the green light against the IDOC but the latest status message is 68 (Error no further processing).
64 - Idoc ready for transfer. (We can use Transaction BD20 to process the waiting IDOCs).
50 - Idoc Added.
74 - Idoc was created by test transaction . (i.e-With using the transaction WE19).
For Outbound --
03 - Idoc passed to the port OK .
02 - Error passing data to port. (Could not find code page for receiving system).
30 - Idoc ready for dispatch.
01 - Idoc Generated .