Following up on this post to share the solution. I was able to get his to work! The mapkey is as follows:
mapkey(continued) @MAPKEY_LABELNew Drawing;~ Command `ProCmdModelNew` ;\
mapkey(continued) ~ Select `new` `Type` 1 `Drawing`;\
mapkey(continued) @MANUAL_PAUSEType Drawing File Name \nand Common Name;~ Activate `new` `OK`;\
mapkey(continued) ~ Activate `dwg_create` `psh_model_browse`;\
mapkey(continued) ~ Trail `UI Desktop` `UI Desktop` `DLG_PREVIEW_POST` `file_open`;\
mapkey(continued) ~ Update `file_open` `Inputname` `*-501.asm`;\
mapkey(continued) ~ Activate `file_open` `Inputname`;~ Activate `file_open` `Inputname`;\
mapkey(continued) ~ Select `dwg_create` `rad_format` 1 `1`;\
mapkey(continued) ~ Select `dwg_create` `template_names` 1 `def_template`;\
mapkey(continued) ~ Activate `dwg_create` `psh_ok`;\
mapkey(continued) ~ Activate `main_dlg_cur` `page_Table_control_btn` 1;\
mapkey(continued) ~ Command `ProCmdDwgTblFromFile` ;\
mapkey(continued) ~ Trail `UI Desktop` `UI Desktop` `DLG_PREVIEW_POST` `file_open`;\
mapkey(continued) ~ Activate `file_open` `view_favorites`;\
mapkey(continued) ~ Select `file_open` `Ph_list.Filelist` 1 `AUTO-BOM`;\
mapkey(continued) ~ Activate `file_open` `Ph_list.Filelist` 1 `AUTO-BOM`;\
mapkey(continued) ~ Select `file_open` `Ph_list.Filelist` 1 `def_table.tbl`;\
mapkey(continued) ~ Activate `file_open` `Ph_list.Filelist` 1 `def_table.tbl`;\
mapkey(continued) @PAUSE_FOR_SCREEN_PICK;
Adding the " * " to the file name was key, and it works every time. This mapkey also selects the default table template I use that has repeat regions for auto populating material information and waits for placement on the drawing face..