A few things to consider:
It might be better to use the %nomads'lib_iol1$, as it uses all string fields which might be easier to use:
IOLIST OBJ_NME$,OBJ_C$,OBJ_L$,OBJ_W$,OBJ_H$,OBJ_TYPE$,OBJ_TXT$,OBJ_VAL$,OBJ_TAB,OBJ_DEF$,OBJ_DSP$,OBJ_FCS$,OBJ_SEL$,OBJ_MSG$,OBJ_HLP$,OBJ_ATTR$,OBJ_IDX$,OBJ_HOTKEY$,OBJ_QRY$,OBJ_SEC$,OBJ_STS$,OBJ_GRP$,OBJ_NULL$,OBJ_TAG$,OBJ_TBL$,OBJ_INP$,OBJ_OUT$,OBJ_VALID$,OBJ_CLASS$,OBJ_TIP$,OBJ_ORIG$,OBJ_FONT$,OBJ_COLOR$,OBJ_LISTBOX_TYPE$,OBJ_SEP$,OBJ_SCRATCH$,OBJ_POPUP$,OBJ_SIZING$,OBJ_LOGIC1$,OBJ_LOGIC2$,OBJ_POPUP_LOGIC$,OBJ_QRY_BITMAP$,OBJ_QRY_WIDTH,OBJ_QRY_TIP$,OBJ_QRY_ATTR$,OBJ_EXTENSION$,OBJ_DEMAND$,OBJ_DEMAND_LOGIC$,OBJ_BACKGROUND_LOGIC$,OBJ_PERSISTENCE$,OBJ_NOTES$,OBJ_TBL_LEN,OBJ_TVLINE_COLOR$,OBJ_AUTOSZ_WIDTH$,OBJ_AUTOSZ_HEIGHT$,OBJ_AUTOMATION_TEXT$,OBJ_HILIGHT_COLORS$,OBJ_PROPS$,OBJ_VISUAL_CLASS$,OBJ_INOMADS_CLASS$
There is a conversion program used by svn to convert an individual panel to a text file. (Attached is a sample columnwidth.txt). You could possibly take the program (*plus/proj/pxpnl) and alter it output to a single text file for all the panels.