This could be the result of the current state of the duty finder, but you never know.

This has happened to me twice now and is frustrating given the current queue times for the duty finder: I'll finally find a party and ready up, after 30 seconds of the remainder of my party readying, I'll get "You have withdrawn your registration" without doing anything.

Time: 8/25, 5:50 AM GMT
Frequency: As frequent as a 30 minute duty finder queue time will allow
World name: Ultros
Character name: Moofey Sorbet
Class/Level: 18 ARC
Party or solo: Queued solo
In-game time: Anytime
Area and coordinates: Anywhere
Steps:
1. Join the Duty Finder queue
2. Click the "commence" button when a party is found.
3. Repeat if another party member withdraws until you get a party that is all ready. Wait for results.

PC Specs
-=-=-=-=- System Information -=-=-=-=-
Code:
------------------
System Information
------------------
Time of this report: 8/24/2013, 22:54:41
       Machine name: MOOF
   Operating System: Windows 8 Pro with Media Center 64-bit (6.2, Build 9200) (9200.win8_gdr.130531-1504)
           Language: English (Regional Setting: English)
System Manufacturer: Acer
       System Model: Aspire 5560
               BIOS: AcerSystem v2.2
          Processor: AMD A6-3400M APU with Radeon(tm) HD Graphics (4 CPUs), ~1.4GHz
             Memory: 6144MB RAM
Available OS Memory: 5606MB RAM
          Page File: 7851MB used, 2874MB available
        Windows Dir: C:\WINDOWS
    DirectX Version: DirectX 11
DX Setup Parameters: Not found
   User DPI Setting: Using System DPI
 System DPI Setting: 96 DPI (100 percent)
    DWM DPI Scaling: Disabled
     DxDiag Version: 6.02.9200.16384 64bit Unicode

------------
DxDiag Notes
------------
      Display Tab 1: No problems found.
        Sound Tab 1: No problems found.
          Input Tab: No problems found.

--------------------
DirectX Debug Levels
--------------------
Direct3D:    0/4 (retail)
DirectDraw:  0/4 (retail)
DirectInput: 0/5 (retail)
DirectMusic: 0/5 (retail)
DirectPlay:  0/9 (retail)
DirectSound: 0/5 (retail)
DirectShow:  0/6 (retail)

---------------
Display Devices
---------------
          Card name: AMD Radeon(TM) HD 6520G
       Manufacturer: Advanced Micro Devices, Inc.
          Chip type: AMD Radeon HD 6520G (0x9647)
           DAC type: Internal DAC(400MHz)
        Device Type: Full Device
         Device Key: Enum\PCI\VEN_1002&DEV_9647&SUBSYS_059F1025&REV_00
     Display Memory: 3047 MB
   Dedicated Memory: 500 MB
      Shared Memory: 2547 MB
       Current Mode: 1366 x 768 (32 bit) (60Hz)
       Monitor Name: Generic PnP Monitor
      Monitor Model: unknown
         Monitor Id: AUO26EC
        Native Mode: 1366 x 768(p) (60.014Hz)
        Output Type: Internal
        Driver Name: aticfx64.dll,aticfx64.dll,aticfx64.dll,aticfx32,aticfx32,aticfx32,atiumd64.dll,atidxx64.dll,atidxx64.dll,atiumdag,atidxx32,atidxx32,atiumdva,atiumd6a.cap,atitmm64.dll
Driver File Version: 8.17.0010.1140 (English)
     Driver Version: 8.982.10.8000
        DDI Version: 11
     Feature Levels: 11.0,10.1,10.0,9.3,9.2,9.1
       Driver Model: WDDM 1.2
Graphics Preemption: DMA
 Compute Preemption: DMA
  Driver Attributes: Final Retail
   Driver Date/Size: 10/12/2012 03:32:22, 1112064 bytes
        WHQL Logo'd: Yes
    WHQL Date Stamp: 
  Device Identifier: {D7B71EE2-D507-11CF-E177-9525BEC2C535}
          Vendor ID: 0x1002
          Device ID: 0x9647
          SubSys ID: 0x059F1025
        Revision ID: 0x0000
 Driver Strong Name: oem32.inf:cb0ae414e94dfbcd:ati2mtag_Sumo_Mobile:8.982.10.8000:pci\ven_1002&dev_9647&subsys_059f1025
     Rank Of Driver: 00E00001
        Video Accel: ModeMPEG2_A ModeMPEG2_C 
        DXVA2 Modes: DXVA2_ModeMPEG2_VLD  DXVA2_ModeMPEG2_IDCT  DXVA2_ModeH264_VLD_NoFGT  DXVA2_ModeVC1_VLD  
   Deinterlace Caps: {6E8329FF-B642-418B-BCF0-BCB6591E255F}: Format(In/Out)=(YUY2,YUY2) Frames(Prev/Fwd/Back)=(0,0,1) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_PixelAdaptive 
                     {335AA36E-7884-43A4-9C91-7F87FAF3E37E}: Format(In/Out)=(YUY2,YUY2) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_BOBVerticalStretch 
                     {5A54A0C9-C7EC-4BD9-8EDE-F3C75DC4393B}: Format(In/Out)=(YUY2,YUY2) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY 
                     {6E8329FF-B642-418B-BCF0-BCB6591E255F}: Format(In/Out)=(UYVY,UYVY) Frames(Prev/Fwd/Back)=(0,0,1) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_PixelAdaptive 
                     {335AA36E-7884-43A4-9C91-7F87FAF3E37E}: Format(In/Out)=(UYVY,UYVY) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_BOBVerticalStretch 
                     {5A54A0C9-C7EC-4BD9-8EDE-F3C75DC4393B}: Format(In/Out)=(UYVY,UYVY) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY 
                     {5A54A0C9-C7EC-4BD9-8EDE-F3C75DC4393B}: Format(In/Out)=(YV12,0x32315659) Frames(Prev/Fwd/Back)=(0,0,0) Caps=
                     {3C5323C1-6FB7-44F5-9081-056BF2EE449D}: Format(In/Out)=(NV12,0x3231564e) Frames(Prev/Fwd/Back)=(0,0,2) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_PixelAdaptive 
                     {552C0DAD-CCBC-420B-83C8-74943CF9F1A6}: Format(In/Out)=(NV12,0x3231564e) Frames(Prev/Fwd/Back)=(0,0,2) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_PixelAdaptive 
                     {6E8329FF-B642-418B-BCF0-BCB6591E255F}: Format(In/Out)=(NV12,0x3231564e) Frames(Prev/Fwd/Back)=(0,0,1) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_PixelAdaptive 
                     {335AA36E-7884-43A4-9C91-7F87FAF3E37E}: Format(In/Out)=(NV12,0x3231564e) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_BOBVerticalStretch 
                     {5A54A0C9-C7EC-4BD9-8EDE-F3C75DC4393B}: Format(In/Out)=(NV12,0x3231564e) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY 
                     {5A54A0C9-C7EC-4BD9-8EDE-F3C75DC4393B}: Format(In/Out)=(IMC1,UNKNOWN) Frames(Prev/Fwd/Back)=(0,0,0) Caps=
                     {5A54A0C9-C7EC-4BD9-8EDE-F3C75DC4393B}: Format(In/Out)=(IMC2,UNKNOWN) Frames(Prev/Fwd/Back)=(0,0,0) Caps=
                     {5A54A0C9-C7EC-4BD9-8EDE-F3C75DC4393B}: Format(In/Out)=(IMC3,UNKNOWN) Frames(Prev/Fwd/Back)=(0,0,0) Caps=
                     {5A54A0C9-C7EC-4BD9-8EDE-F3C75DC4393B}: Format(In/Out)=(IMC4,UNKNOWN) Frames(Prev/Fwd/Back)=(0,0,0) Caps=
                     {5A54A0C9-C7EC-4BD9-8EDE-F3C75DC4393B}: Format(In/Out)=(S340,UNKNOWN) Frames(Prev/Fwd/Back)=(0,0,0) Caps=
                     {5A54A0C9-C7EC-4BD9-8EDE-F3C75DC4393B}: Format(In/Out)=(S342,UNKNOWN) Frames(Prev/Fwd/Back)=(0,0,0) Caps=
       D3D9 Overlay: Not Supported
            DXVA-HD: Not Supported
       DDraw Status: Enabled
         D3D Status: Enabled
         AGP Status: Enabled