Mike's PBX Cookbook

Application Builder AOS error

CallPilot 4.04

Problem Description

Clients are unable to access Application Builder due to an AOS error.

Problem Resolution

Verify the following TCP and UDP ports are enabled:

Verify the following DCOM settings:

  1. Open Start → Administrative Tools → Component Service.
  2. On the left pane of Component Services go to Component Services → Computers → My Computer.
  3. Open Default Properties tab in My Computer properties.
  4. Make sure that Enable Distributed COM on this computer checkbox is checked.
  5. Make sure that Default connection level dropbox is set to Connect.
  6. Make sure that Default Impersonation level dropbox is set to Identify.

Verify the following AOS DCOM permissions: (on server)

  1. Open Start → Administrative Tools → Component Service.
  2. On the left pane of Component Services go to Component Services → Computers → My Computer → DCOM Config → nmaos.
  3. Open Security tab in nmaos properties.
  4. Under Launch and Activation Permissions click Customize and then click Edit button.
  5. Make sure that ANONYMOUS LOGON group has Local Launch, Local Activation and Remote Activation permissions granted.
  6. If not, then add ANONYMOUS LOGON group with Local Launch, Local Activation and Remote Activation permissions granted.
  7. If not, correct and reboot.

Verify the following Local Security Policy settings: (must do on both server and client)

  1. Go to Start → Programs → Administrative Tools → Local Security Policy.
  2. On the left pane select Security Settings → Local Policies → Security Options.
  3. On the right pane find "DCOM: Machine Launch Restrictions in Security Descriptor Definition Language (SDDL) syntax" line and double click on it.
  4. Click Edit Security. Launch Permission window will appear.
  5. Make sure that ANONYMOUS LOGON group is granted with Local Launch and Remote Activation permissions. Grant them if necessary by selecting Add, Advanced, Find Now, and double clicking on ANONYMOUS LOGIN, then save your changes.
  6. Reboot is not required.