We are setting up new servers at CC 8.1.1.11 and going through basic tests.

From a CC Explorer client we try and add a simple .txt file to source control and get the error

```
Error adding "path to filename.txt" to source control Unable to transfer file : 
error detected by Clearcase Subsystem.

```

Selecting Ok on the error pop-up we can then see the "Green Tick" against the file showing it checked out but when we try to check in we get the same error.

In the mvfs log on the client machine we see the following

```
Fetch cleartext view=viewname vob=\vobname dbid=0x43 - I/O error
See view log on  view server for more info.

```

View Log on view Server -

```
Error: view_server.exe error unable to construct cleartext for object "0x43" in vob "path to vob" 
Error detected by clearcase subsystem
Error unable to transfer a file.

```

Client machine and view server are windows. Vob server aix  

No significant errors when running ClearCase doctor.

How can I avoid this error?