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ko:zoo4:writemailsloterror [2015/09/14] (current)
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 +====== "​Failed to write to client mailslot"​ error ======
 +> **Product:​** //​[[zoo4:​home|Zoo 4.0]]//
 +> **Summary:​** //Solving the "​Failed to write to client mailslot..."​ error.//
  
 +===== Question =====
 +I have installed the Zoo on one of our server. But none of my Rhino clients can obtain a license. When I look in the Zoo's log file, I see the following errors:
 +
 +<​code>​
 +<​date>​ <​time> ​ ERROR: Failed to write to client mailslot on: <​computer>​
 +<​date>​ <​time> ​ LAST ERROR 183: Cannot create a file when that file already exists.
 +</​code>​
 +
 +===== Answer =====
 +The error message indicates that the Zoo was able to create a **[[zoo:​mailslot|mailslot]]** but was unable to write to it.
 +
 +===== Resolution =====
 +  - Verify that **Client for Microsoft Networks** both installed and enabled on the Network Connection on the system running the Zoo.
 +  - Verify that **Enable NetBIOS over TCP/IP** is checked in the advanced TCP/IP options of Network Connection on the system running the Zoo.
 +  - If the computer running the Zoo is also running a firewall, make sure that **UDP Ports 137 and 138 and TCP Port 139** are open.
 +  - If there are one or more routers between your Rhino systems and the Zoo, make sure that **UDP Ports 137 and 138 and TCP Port 139** are open on those routers too.
 +  - Verify the the system running the Zoo server can "​see"​ other systems on your network. In other works, verify that is named service lookup, either DNS or WINS, is operational.
 +
 +It should be noted that these are known fixes to this problem. The error, //"​Cannot create a file when that file already exists"//,​ is a common Windows error. So, it is possible that the resolution to this problem, in your situation, might be something other than what is listed above.
 +
 +\\
 +
 +{{tag>​Zoo4_ko}}
ko/zoo4/writemailsloterror.txt ยท Last modified: 2015/09/14 (external edit)