System.arraycopy(outputBytes, 0, buf, pos, outputCount);
        }
        return buf;
    }

    // Helper: build an error body (without header) with structureSize=9
    private static byte[] buildErrorBody(int errorContextCount, int bc, byte[] errorData) {
        int bodyLen = 8 + bc; // 8 bytes fixed + variable data
        byte[] buf = new byte[bodyLen];
        SMBUtil.writeInt2(9, buf, 0); // structureSize