Issue in creation of MDG file Structure for CCTR/PCTR from File Download in MDG7.0 SP02

Hi

I am able to create MDG file structure for CCTR previously.But when I tried it today again it says 0 data records are transformed in step 5 of File Download linlk and in generated file structure there is no header line with MDG Technical fields. Same happens with PCTR.

Can any one explains reason for this?