lyx2lyx convert failed

[Carlos Sosa Paz]

Dear all

I wrote my lyx file in 1.4.2 lyx version but when i try to open it in 1.4.3 
version i got the following error message lyx2lyx failed to convert.
Find attach the file.

Thanks
Carlos Sosa Paz

setofcost.lyx
Description: setofcost.lyx