View source for Understanding the alert error numbers

== Format of the alert error number ==

The 32 bit long error number consists of 4 segments. Amiga displays the number in hexadecimal and in a general format it looks like this:

 0x'''DIGGSSSS'''

The letters have the following meaning:
{| class="wikitable"
! Letters in Code
! Description
! Bits
! Length (bits)
|-
| D
| Alert type: DeadEnd (bit 31 is set) or RecoveryAlert (bit 31 is not set)
| 31
| 1
|-
| I
| ROM subsystem number
| 30...24
| 7
|-
| GG
| General error: roughly indicates what the error was
| 23...16
| 8
|-
| SSSS
| Specific error: indicates more detail
| 15...0
| 16
|}

== Hardware and CPU specific alerts ==

{| class="wikitable"
! Alert
! Type
! Description
|-
| 0x00000002
| Recoverable
| Hardware bus fault or access error
|-
| 0x00000003
| Recoverable
| Illegal address access i.e. odd address
|-
| 0x00000004
| Recoverable
| Illegal instruction
|-
| 0x00000005
| Recoverable
| Divide by zero
|-
| 0x00000006
| Recoverable
| Check instruction error
|-
| 0x00000007
| Recoverable
| TrapV instruction error
|-
| 0x00000008
| Recoverable
| Privilege violation error
|-
| 0x00000009
| Recoverable
| Trace error
|-
| 0x0000000A
| Recoverable
| Line 1010 Emulator error
|-
| 0x0000000B
| Recoverable
| Line 1111 Emulator error
|-
| 0x0000000E
| Recoverable
| Stack frame format error
|-
| 0x00000018
| Recoverable
| Spurious interrupt error
|-
| 0x00000019
| Recoverable
| AutoVector Level 1 interrupt error
|-
| 0x0000001A
| Recoverable
| AutoVector Level 2 interrupt error
|-
| 0x0000001B
| Recoverable
| AutoVector Level 3 interrupt error
|-
| 0x0000001C
| Recoverable
| AutoVector Level 4 interrupt error
|-
| 0x0000001D
| Recoverable
| AutoVector Level 5 interrupt error
|-
| 0x0000001E
| Recoverable
| AutoVector Level 6 interrupt error
|-
| 0x0000001F
| Recoverable
| AutoVector Level 7 interrupt error
|-
|-
| 0x80000002
| Dead end
| Hardware bus fault or access error
|-
| 0x80000003
| Dead end
| Illegal address access i.e. odd address
|-
| 0x80000004
| Dead end
| Illegal instruction
|-
| 0x80000005
| Dead end
| Divide by zero
|-
| 0x80000006
| Dead end
| Check instruction error
|-
| 0x80000007
| Dead end
| TrapV instruction error
|-
| 0x80000008
| Dead end
| Privilege violation error
|-
| 0x80000009
| Dead end
| Trace error
|-
| 0x8000000A
| Dead end
| Line 1010 Emulator error
|-
| 0x8000000B
| Dead end
| Line 1111 Emulator error
|-
| 0x8000000E
| Dead end
| Stack frame format error
|-
| 0x80000018
| Dead end
| Spurious interrupt error
|-
| 0x80000019
| Dead end
| AutoVector Level 1 interrupt error
|-
| 0x8000001A
| Dead end
| AutoVector Level 2 interrupt error
|-
| 0x8000001B
| Dead end
| AutoVector Level 3 interrupt error
|-
| 0x8000001C
| Dead end
| AutoVector Level 4 interrupt error
|-
| 0x8000001D
| Dead end
| AutoVector Level 5 interrupt error
|-
| 0x8000001E
| Dead end
| AutoVector Level 6 interrupt error
|-
| 0x8000001F
| Dead end
| AutoVector Level 7 interrupt error
|}

== General alerts ==

{| class="wikitable"
! Alert
! Type
! Description
|-
| 0x00010000
| Recoverable
| No memory
|-
| 0x00020000
| Recoverable
| Make library error
|-
| 0x00030000
| Recoverable
| Open library error
|-
| 0x00040000
| Recoverable
| Open device error
|-
| 0x00050000
| Recoverable
| Open resource error
|-
| 0x00060000
| Recoverable
| IO error
|-
| 0x00070000
| Recoverable
| No signal
|-
| 0x00080000
| Recoverable
| Bad parameter
|-
| 0x00090000
| Recoverable
| Too many library closes
|-
| 0x000A0000
| Recoverable
| Too many device closes
|-
| 0x000B0000
| Recoverable
| Process creation failed
|-
| 0x000C0000
| Recoverable
| Obsolete feature used
|-
| 0x00008001
| Recoverable
| Exec library error
|-
| 0x00008002
| Recoverable
| Graphics library error
|-
| 0x00008003
| Recoverable
| Layers library error
|-
| 0x00008004
| Recoverable
| Intuition library error
|-
| 0x00008005
| Recoverable
| Math library error
|-
| 0x00008007
| Recoverable
| DOS library error
|-
| 0x00008008
| Recoverable
| RAM library error
|-
| 0x00008009
| Recoverable
| Icon library error
|-
| 0x0000800A
| Recoverable
| Expansion library error
|-
| 0x0000800B
| Recoverable
| Diskfont library error
|-
| 0x0000800C
| Recoverable
| Utility library error
|-
| 0x0000800D
| Recoverable
| KeyMap library error
|-
| 0x0000800E
| Recoverable
| Newlib library error
|-
| 0x00008010
| Recoverable
| Audio device error
|-
| 0x00008011
| Recoverable
| Console device error
|-
| 0x00008012
| Recoverable
| GamePort device error
|-
| 0x00008013
| Recoverable
| Keyboard device error
|-
| 0x00008014
| Recoverable
| TrackDisk device error
|-
| 0x00008015
| Recoverable
| Timer device error
|-
| 0x00008020
| Recoverable
| CIA resource error
|-
| 0x00008021
| Recoverable
| Disk resource error
|-
| 0x00008022
| Recoverable
| Misc resource error
|-
| 0x00008030
| Recoverable
| BootStrap error
|-
| 0x00008031
| Recoverable
| Workbench error
|-
| 0x00008032
| Recoverable
| DiskCopy error
|-
| 0x00008033
| Recoverable
| GadTools error
|-
| 0x00008035
| Recoverable
| Unknown error
|-
|}

== Specific alerts ==

Exec library
{| class="wikitable"
! Alert
! Type
! Description
|-
| 0x01000000
| Recoverable
| Exec library error
|-
| 0x01000001
| Recoverable
| 68000 exception vector checksum (OBSOLETE)
|-
| 0x01000002
| Recoverable
| Execbase checksum error (OBSOLETE)
|-
| 0x01000003
| Recoverable
| Library checksum failure
|-
| 0x01000004
| Recoverable
| Interface checksum failure
|-
| 0x81000005
| Dead end
| Corrupt memory list detected in FreeMem
|-
| 0x81000006
| Dead end
| No memory for interrupt servers
|-
| 0x01000007
| Recoverable
| InitStruct() of an APTR source (OBSOLETE)
|-
| 0x01000008
| Recoverable
| A semaphore is in an illegal state at ReleaseSemaphore()
|-
| 0x01000009
| Recoverable
| Freeing memory already freed
|-
| 0x8100000A
| Dead end
| Illegal 68k exception taken (OBSOLETE)
|-
| 0x0100000B
| Recoverable
| Attempt to reuse active IORequest
|-
| 0x0100000C
| Recoverable
| Sanity check on memory list failed during AvailMem(MEMF_LARGEST)
|-
| 0x0100000D
| Recoverable
| IO attempted on closed IORequest
|-
| 0x0100000E
| Recoverable
| Stack appears to extend out of range
|-
| 0x0100000F
| Recoverable
| Memory header not allocated. Usually an invalid address passed to FreeMem()
|-
| 0x01000010
| Recoverable
| An attempt was made to use the old message semaphores
|-
| 0x01000011
| Recoverable
| A bad memory request was made - Realloc on non-allocated memory
|-
| 0x01000012
| Recoverable
| An uninitialized hook was called
|-
|}

Graphics library
{| class="wikitable"
! Alert
! Type
! Description
|-
| 0x02000000
| Recoverable
| Graphics library error
|-
| 0x82010000
| Dead end
| Graphics out of memory
|-
| 0x82010001
| Dead end
| MonitorSpec alloc, no memory
|-
| 0x82010006
| Dead end
| Long frame, no memory
|-
| 0x82010007
| Dead end
| Short frame, no memory
|-
| 0x02010009
| Recoverable
| Text, no memory for TmpRas
|-
| 0x8201000A
| Dead end
| BltBitMap, no memory
|-
| 0x8201000B
| Dead end
| Regions, memory not available
|-
| 0x82010030
| Dead end
| MakeVPort, no memory
|-
| 0x0200000C
| Recoverable
| New error
|-
| 0x0200000D
| Recoverable
| Free error
|-
| 0x82011234
| Dead end
| Emergency memory not available
|-
| 0x02000401
| Recoverable
| Unsupported font description used
|-
|}

Layers library
{| class="wikitable"
! Alert
! Type
! Description
|-
| 0x03000000
| Recoverable
| Layers library error
|-
| 0x83010000
| Dead end
| Layers out of memory
|-
|}

Intuition library
{| class="wikitable"
! Alert
! Type
! Description
|-
| 0x04000000
| Recoverable
| Intuition library error
|-
| 0x84000001
| Dead end
| Unknown gadget type
|-
| 0x04000001
| Recoverable
| Recovery form of AN_GadgetType
|-
| 0x84010002
| Dead end
| Create port, no memory
|-
| 0x04010003
| Recoverable
| Item plane alloc, no memory
|-
| 0x04010004
| Recoverable
| Sub alloc, no memory
|-
| 0x84010005
| Dead end
| Plane alloc, no memory
|-
| 0x84000006
| Dead end
| Item box top < RelZero
|-
| 0x84010007
| Dead end
| Open screen, no memory
|-
| 0x84010008
| Dead end
| Open screen, raster alloc, no memory
|-
| 0x84000009
| Dead end
| Open sys screen, unknown type
|-
| 0x8401000A
| Dead end
| Add SW gadgets, no memory
|-
| 0x8401000B
| Dead end
| Open window, no memory
|-
| 0x8400000C
| Dead end
| Bad State Return entering Intuition
|-
| 0x8400000D
| Dead end
| Bad Message received by IDCMP
|-
| 0x8400000E
| Dead end
| Weird echo causing incomprehension
|-
| 0x8400000F
| Dead end
| Couldn't open the Console Device
|-
| 0x04000010
| Recoverable
| Intuition skipped obtaining a sem
|-
| 0x04000011
| Recoverable
| Intuition obtained a sem in bad order
|-
|}

Math library