I disagree with you on:
From the study I came to know that if we use two conditions for suppressing the report footer it wont work. With a single condition the report footer gets suppressed but not with two conditions.
What you're essentially trying to do is suppress the Report Footer based on the 'first' value that appears in the report. The Report header will always access the first record in the report whereas the Report Footer will always look at the 'last'.
The formula that we suggested 'will work' if those values {spOrderAck;1.name} = 'Schneider Electric' and InStr (1,{spOrderAck;1.description} ,'BLOKSET' )=1 appear on the Report Footer.
Anyway, I'm glad that you figured it out!
-Abhilash