Reconstruction level and type of imported file

Dear MadAnalysis team,

there is some thing not clear for me about the level of the MadAnalysis run mode and the type of the imported files ..

If I want to run on the reconstruction level or detector level, I think I should import " tag_1_pgs_events.lhco.gz "
file not " tag_1_pythia_events.hep.gz " is this true ?

but in -R level I need to specify the jet clustering algorithm, when I type in a shell

bin/ma5 -R
ma5> set main.clustering.algorithm = antikt
ma5> set main.clustering.radius = 0.4
ma5>import /<path>/tag_1_pgs_events.lhco.gz as gh

It says : ERROR: The dataset '/tag_1_pgs_events.lhco.gz' has a unsupported format.
While when import the hep file it continue and gives no errors, so why this is happen ? I think I still should use lhco
file which generated after pgs running at Madgraph but I don't know how to specify the clustering algorithm with
this file ..

Thanks,
Safinaz