Miscellanous Tips part 1

Set the appropriate breakpoins
Go to the tramnsaction from which ypoy generate the IDOC (E.g. ME22 or VL02)
Go to the messages for the document you select ( In ME22 use menu Header->Messages). In other transactioncodes the mneu for messages may be palced somewhere else.
In the Output window choose an existing message and press Repeat output (Or create a new message)
Select menu Further data and change the dspatch time to 1 Send with periodically scheduled job
Submit pogram RSNAT00. In the selection screen choose transmission medium 6 EDI and enter any further selection criterias
Enter debug mode ( Type /H in the command line)
Execute RSNAT00

Usefull function modules

By Kevin Wilson - From ErpGenie.com

IDOCTYPES_LIST_WITH_MESSAGES	Returns a list of all Basis types (IDoc types), Extensions (IDoc types) and all messages related with their respective IDoc types.	since release 4.0B, Hotpackage 48
IDOCTYPES_FOR_MESTYPE_READ	Reads all IDoc types assigned to a message type (logical message).	since release 4.0B, Hotpackge 42
IDOCTYPE_READ_COMPLETE	Reads the structure and attributes (segments), as well as the segment attributes (fields and fixed values), for an IDoc type. In this case, the version of the record types and segments must be sent to the function module.	since release 4.0B, Hotpackge 42
SEGMENT_READ_COMPLETE	Reads the structure and attributes for a segment. In this case, the version of the record types and the release for the segments must be sent to the function module.	since release 4.0B, Hotpackge 42
IDOC_RECORD_READ	Reads the structure of the record types for the specified version.	since release 4.0B, Hotpackge 42

RSNAST00	Processes messages that has not bees sendt (processing <> immediate)
RSNASTED	Program, som kaldes fra Output Message Control ved "udskrift" af ordrer m.v. Indeholder 2 entry points: EDI_PROCESSING og ALE_PROCESSING. Herfra kaldes det function module, som er tildelt via partner profilen og process koden.
RBDMIDOC	Generates IDOC's from change pointers (You can also use transaction BD21)
RSEOUT00	Processes outbound IDOC's with status 30, ( IDOC's mass processing)
RBDAPP01	Processes inbound IDOC's.
RSECHK07	Check if partner profiler is valid

Use program RSNAST00 to process the IDOCs

Table	Discription
NAST	Message Status
EDIDC	Control information for an IDOC
EDID4	Data Records from 4.0 onwards
EDIDS	Status of an IDOC