Index: trunk/src_plugins/order/order.h
===================================================================
--- trunk/src_plugins/order/order.h	(revision 36889)
+++ trunk/src_plugins/order/order.h	(revision 36890)
@@ -76,6 +76,7 @@
 	char *help;
 	pcb_order_autoload_t autoload;
 	int wid;                /* widget id, if any */
+	int wwarn;              /* widget id for the warning widget */
 	char name[1];           /* dynamic length */
 };
 
@@ -82,7 +83,11 @@
 /* Build a hbox from a field */
 void pcb_order_dad_field(order_ctx_t *octx, pcb_order_field_t *f);
 
+/* When the dialog is already active, indicate an error for field or remove
+   indication if details is NULL. */
+void pcb_order_field_error(order_ctx_t *octx, pcb_order_field_t *f, const char *details);
 
+
 /* Free data stored in a field, but not the field itself. Note: ->name and
    ->type remains valid after the call */
 void pcb_order_free_field_data(order_ctx_t *octx, pcb_order_field_t *f);
Index: trunk/src_plugins/order/order_dlg.c
===================================================================
--- trunk/src_plugins/order/order_dlg.c	(revision 36889)
+++ trunk/src_plugins/order/order_dlg.c	(revision 36890)
@@ -137,6 +137,11 @@
 		RND_DAD_BEGIN_VBOX(octx->dlg);
 			RND_DAD_COMPFLAG(octx->dlg, RND_HATF_EXPFILL);
 		RND_DAD_END(octx->dlg);
+		RND_DAD_LABEL(octx->dlg, "");
+			f->wwarn = RND_DAD_CURRENT(octx->dlg);
+		RND_DAD_BEGIN_VBOX(octx->dlg);
+			RND_DAD_COMPFLAG(octx->dlg, RND_HATF_EXPFILL);
+		RND_DAD_END(octx->dlg);
 		switch(f->type) {
 			case RND_HATT_ENUM:
 				RND_DAD_ENUM(octx->dlg, f->enum_vals);
@@ -166,3 +171,16 @@
 		f->wid = RND_DAD_CURRENT(octx->dlg);
 	RND_DAD_END(octx->dlg);
 }
+
+void pcb_order_field_error(order_ctx_t *octx, pcb_order_field_t *f, const char *details)
+{
+	rnd_hid_attr_val_t hv;
+
+	if (details != NULL)
+		hv.str = "ERROR";
+	else
+		hv.str = "";
+
+	rnd_gui->attr_dlg_set_value(octx->dlg_hid_ctx, f->wwarn, &hv);
+	rnd_gui->attr_dlg_set_help(octx->dlg_hid_ctx, f->wwarn, details);
+}