Examination with gdb indicates that it is returning 0 based on the
returned value of interpreterProxy->failed() at the point indicated
below.

Anyone care to help me figure out what that means?

Ken

EXPORT(int) primitiveAddBitmapFill(void) {
    int cmOop;
    int dirOop;
    int originOop;
    int tileFlag;
    int formOop;
    int fill;
    int xIndex;
    int nrmOop;

	if (!((interpreterProxy->methodArgumentCount()) == 7)) {
		return interpreterProxy->primitiveFail();
	}
	xIndex = interpreterProxy->stackIntegerValue(0);
	if (xIndex <= 0) {
		return interpreterProxy->primitiveFail();
	}
	nrmOop = interpreterProxy->stackObjectValue(1);
	dirOop = interpreterProxy->stackObjectValue(2);
	originOop = interpreterProxy->stackObjectValue(3);
	tileFlag =
interpreterProxy->booleanValueOf(interpreterProxy->stackValue(4));
	if (tileFlag) {
		tileFlag = 1;
	} else {
		tileFlag = 0;
	}
	cmOop = interpreterProxy->stackObjectValue(5);
	formOop = interpreterProxy->stackObjectValue(6);
	if (interpreterProxy->failed()) {
		return null;
	}
	if
(!(quickLoadEngineFromrequiredState(interpreterProxy->stackObjectValue(7), GEStateUnlocked))) {
		return interpreterProxy->primitiveFail();
	}
	loadPointfrom(((int *) (workBuffer + GWPoint1)), originOop);
	loadPointfrom(((int *) (workBuffer + GWPoint2)), dirOop);
	loadPointfrom(((int *) (workBuffer + GWPoint3)), nrmOop);
	if (interpreterProxy->failed()) {
---->		return 0;
	}
	fill = loadBitmapFillcolormaptilefromalongnormalxIndex(formOop, cmOop,
tileFlag, ((int *) (workBuffer + GWPoint1)), ((int *) (workBuffer +
GWPoint2)), ((int *) (workBuffer + GWPoint3)), xIndex - 1);
	if (engineStopped) {
		return interpreterProxy->primitiveFail();
	}
	if (!(interpreterProxy->failed())) {
		/* begin storeEngineStateInto: */
		workBuffer[GWObjUsed] = objUsed;
		interpreterProxy->pop(8);
		interpreterProxy->push(interpreterProxy->positive32BitIntegerFor(fill));
	}
}

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