problem when export tobi project

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When I tried to export my tobi project I got the message
" Oops, a problem occurred.
The full error message is displayed below.
Alternatively, you may open the 'Tobi.log' file, located here: [ C:\Users\Pipat\Desktop\Tobi_NET4_2.1.0.0\Tobi.log ].

[urakawa.exception.MethodParameterIsEmptyStringException] The sub-chunk exceeds beyond the end of the source streamhttp://2.1.0.0/"
What does it mean?
How can I solve this problem?

We have analysed the log file you sent and are working on the solution of identifying the corrupt phrases and replacing them.
with regards
Avneesh