This might be a permissions issue. Are you running Therion while logged in as a user with restricted permissions? Survex may be creating output which Therion does not have permission to read. Just speculating here, as I have never had this problem myself.

Footleg

On Sun, Sep 20, 2015 at 4:03 PM Nick Bairstow <Nick@pff.uk.com> wrote:

I have one Win 7 PC which gives me the above warning on compile.
I have survex installed. Same data on portable drive woks fine on all other machines.
Any pointers would be appreciated.

Thanks.
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