basically what I am trying to do is to backtest an SPX option strategy on 1 min intervalls.
But I realized I cannot import the data as the dataset becomes too large...
And apparently zorro only allows for yearly history files.

Hmm, meanwhile I tried to load the contract data manually:
dataLoad(1, strf("SPX_%s.t8", strdate("%Y-%m-%d",ldate(ET,0))),9);

but ldate is in this case the actual date, not the historical date. I guess Zorro loads the "oldest" data it finds for the asset and runs from there. Trying to set StartDate did not help.