. xtdpdsys effch cycle ex fdi inv hc mkr, lags(1) endog(cycle, lagstruct(2,.)) artests(2)
note: cycle dropped because of collinearity
     _xtdpd_glsaccum3i():  3900  out of memory
     _xtdpd_level_mka1():     -  function returned error
         _xtdpd_dowork():     -  function returned error
                 <istmt>:     -  function returned error