Here is the complete list of all the transaction codes you need to know for ALE & IDOCS. keep it handy, always useful

Main Transaction Codes

Main Menus
WEDI EDI Related Activities
BALE ALE Related Activities
SWLD Workflow Related Activities
SALE ALE Configuration
NACE Message Control Configuration

IDOC Definition
SE11 Data Dictionary
WE30 IDoc type editor
WE31 Segment editor
BD53 Reduction of IDoc types
WE60 Documentation for IDoc types
WE61 Documentation for IDoc record types

IDOC Monitoring
WE02 IDoc display
WE05 IDoc Lists
WE06 Active IDoc monitoring
WE07 IDoc statistics

Configuration(ALE and EDI)
BD54 Maintain logical systems
BD64 Maintain distribution model
BD71 Distribute Customer Model
BD82 Generate partner profiles
FILE Logical File Paths
PFTC Task Definition
PPOC Maintain Organization Structure
SM59 Maintain RFC Destinations
SWE2 Event Linkage
SWU3 Basic Workflow Settings
WE20 Partner profiles
WE21 Port definition

Run Time Workflow
SO01 SAP Inbox
SWEL Event Log
SWI1 Workflow Log
SWI2 Work Item Analysis
SWI5 Workload Analysis

Message Control
NACE Condition Record Maintenance
VOK2 SD Message Control Components
VOK3 Purchasing message Control Components
VOFM View Message Requirements
V/86 Condition Table Field Catalog
WE15 IDoc test: Outbound from MC

Testing
WE19 Test tool
WE12 IDoc test: Inb. Procg of Outb. File
WE16 IDoc test: Inbound File
WE17 IDoc test: Inbound status report

Reprocessing IDOCS
BD87 Process inbound IDocs
BD88 Process outbound IDocs

System Monitoring
SM12 Locked Entries
SM13 Update Monitoring
SM21 System Log Display
SM58 Transactional RFC Log
SM66 Debug Async Update Tasks
ST22 Dump Analysis

Other Relevant Transaction Codes
AL05 Monitor current workload
AL11 Display SAP Directories
AL18 Local File System Monitor
AL19 Remote File System Monitor
AL21 ABAP Program analysis
ALO1 Data Relationship Browser
ANA_VAR Table Analysis: Analysis Variants
BA10 Subsystem Config.
BA11 Channel Definition for Transceiver
BD10 Send Material
BD100 IDoc display object channel view
BD101 Consistency check
BD102 Outbound registry
BD103 Inbound registry
BD104 maintain tbd53
BD105 maintain tbd54
BD11 Fetch Material
BD12 Send customer
BD13 Open customer
BD14 Send vendor
BD15 Open vendor
BD16 Send Cost Center
BD17 Get Cost Center
BD18 Send General Ledger Account
BD19 Get General Ledger Account
BD20 IDoc passed to application
BD21 Select change pointer
BD22 Delete change pointers
BD23 Delete serialization data
BD24 Send Cost Elements
BD25 Send Activity Type
BD26 Get Activity Type
BD27 Send cost center activity prices
BD28 Send obj/cost element control data
BD30 Distribute material object list
BD31 Distribute document object list
BD32 Distribute plant allocations(matBOM)
BD40 Read change pointer for group
BD41 Dispatch IDocs for group
BD42 Check IDocs for group
BD43 Post IDocs for group
BD44 Assign message types to ser. group
BD47 Dependencies between methods
BD48 Dependency method – message
BD50 Activ. change pointer for mess.type
BD51 Maintain function modules (inbound)
BD52 Activ.change pointer per chng.doc.it
BD53 Reduction of IDoc types
BD55 Maintain IDoc conversion
BD56 Maintain IDoc segment filtering
BD57 Maintain link and serialization ty.
BD58 Convert Org. units
BD59 Allocation object type -> IDoc type
BD60 Additional data for message type
BD61 Activate change pointer
BD62 Define segment conversion rule
BD63 Transport ALE tables to message type
BD65 Maintain IDoc type required fields
BD66 IDoc type field -> change doc.field
BD67 Maintain input methods
BD68 Maintain lists
BD69 Assign message type to IDoc
BD70 Adjust number ranges
BD72 Activate events
BD73 Reposting of IDocs (ALE)
BD75 Convert IDoc status
BD76 Model upload/download monitoring
BD77 Distribution of control data
BD78 Monitoring control data distribution
BD79 Maintain IDoc conversion rules
BD80 Conversion pre-production/production
BD81 Filter objects parameter filtering
BD83 Send IDocs after an ALE error
BD84 Post IDocs after ALE error
BD85 Consistency check for transfer
BD86 Consistency check for sales
BD89 Control data model. – initial screen
BD90 Start DA-OU
BD91 Send characteristic
BD92 Send class
BD93 Send classification
BD94 OA – file transfer
BD95 Specify ALE object types
BD96 filter objects of receiver determin.
BD97 Assign RFC dest. to logical systems
BD98 ALE consistency check active
BD99 Message type dependencies
BDA1 Call RSARFCEX
BDA4 Specify ALE object types
BDA5 Distribute documents
BDBG Generate ALE interface (BAPI)
BDBP Hierarchy maintenance of BAPI param.
BDBS Generate coding for mapping
BDCP Number range maintenance: ALE_CP
BDLS Mapping Logical System Names
BDM2 Monitoring: IDocs with receiver
BDM5 Consistency check
BDM6 Monitor: Check input workflow
BDM7 ALE Audit: statistical analyses
BDM8 ALE Audit: Sending the confirmations
BDM9 Reorganizing the audit database
BDMC Upload info structures
BDR1 Display application log for recovery
BDR2 Reorganization of recovery data
BDRC ALE: Determine recovery objects
BDRL ALE: Process recovery objects
OE2C Process Code Inbound
OYE0 EDI: Maintain Port Def. arfc
OYE3 Display EDI Ports
OYE4 Display ALE Ports
OYED Maintain Port Definitions
OE3C System Process Code
OE1C Process Code (OutB)
OYEL Display EDP21 (InB Partner Profile)
OYEX Create EDP21 (InB Partner Profile Overview)
OYEH Display EDP12 (Msg Control)
OYER Create EDP12 (Msg Control Overview)
OYEI Display EDP13 (OutB Partner Profile)
OYEU Create EDP13 (OutB Partner Profile overview)
OYSM Number Range Port Definition
OYSN Number Range For IDOCS
OYSO Number Range IDOC Types
WE08 EDI: File Processing Status (EDFI2)
WE09 IDoc lists enhanced
WE10 IDoc lists enhanced
WE14 IDoc test: Outb. from IDoc
WE30 IDoc type editor
WE32 View editor
WE33 Value tables for IDoc documentation
WE40 System process codes
WE41 Process codes, outbound
WE42 Process codes, inbound
WE43 Funct.module: Status record display
WE44 Partner Types and selection reports
WE45 Forward (inbound) (V3, EDILOGADR)
WE46 IDoc administration
WE47 Status Maintenance
WE48 Inbound process codes: Texts
WE49 Inbound process codes: Change texts
WE50 System process codes: Texts
WE51 System process codes: Change texts
WE52 Outbound process codes: Texts
WE53 Outbound process codes: Change texts
WE54 FMs for changing file names
WE55 FMs for path names
WE56 Status process codes
WE57 Messages and application objects
WE58 Status process codes: Texts
WE59 Change status process codes
WE62 Documentation for segments
WE63 Parser for IDoc types and rec.types
WE70 Conversion: Basic types
WE71 Conversion: Extensions
WE72 Conversion: IDoc types
WE73 Conversion: Logical messages
WE80 IDoc types: Overview
WE81 Logical message types
WE82 Assignment IDoc type – Message
WE83 Extensions: Overview (EDCIM)
WE84 Assignment of IDoc and appl. fields
WECP Display CPIC interface status (R/2)
WEL0 Forward (inbound) (EDILOGADR)
WEL1 EDI: Interface Invoice for EDILOGADR
WENA Messages on basis of changes
WorkFlow Configuration
OOAW & SWLV Subordinate And Peer Definition
PFAC Standard Roles
PO13 Maintain Substitutes
SWO1 Business Object Builder