Hi Rubane,
Try change type.
v_fscyr type bdatj,
v_fisper_plant_cy type /BI0/0FISCPER/.
vc_fscyr(4) type c,
vc_fisper(7) type c.
vc_fscyrv = v_fscyr,
concatenate vc_fscyr '016' into vc_fiscper,
v_fiscper_plant_cy = vc_fiscper
l_t_range-low = v_fiscper_plant_cy
v_fiscper_plant_cy = v_fiscper_plant_cy - 1.
vc_fscyrv = v_fiscper_plant_cy.
concatenate vc_fscyr '01' into vc_fiscper,
v_fiscper_plant_cy = vc_fiscper
l_t_range-high = v_fiscper_plant_cy
I hope helps. Regards.