Alles klar danke, hat funktioniert:
lv_tdname+0(12) = ls_qamv-prueflos.
lv_tdname+12(8) = ls_qamv-vorglfnr.
lv_tdname+20(4) = ls_qamv-merknr.
CALL FUNCTION 'READ_TEXT'
EXPORTING
id = 'QMEP'
language = sy-langu
name = lv_tdname
object = 'QEEMERKMAL'
*/ IMPORTING
*/ HEADER =
TABLES
lines = lt_tline
EXCEPTIONS
OTHERS = 1.
LOOP AT lt_tline INTO ls_tline.
CONCATENATE lv_text ls_tline-tdline INTO lv_text.
ENDLOOP.