To retrieve the error log file do the following steps:

1.  Open the integration tool

2.  Click on the Configuration button,  then select the advanced tab

3.  Check the "Enable detailed log file"

4.  Then Save and close.

5.  Re-run the process that was failing  (import or export)

6.  Go back into the Configuration area,  Advanced tab and click on the "Open Log file"  button.

7.  Save this file.

You can then send this file to support to evaluate.