Motorola Moscad/ACE to Modbus Slave

I was able to read from the Modbus unit;
(1) Coil Values (0xxxx)
(2) Holding Registers: somewhere up to 33000

However, I am NOT able to read bigger numbers, for example, 35000...

Is this a limitation of the Motorola Driver mb.2s_PLC1?

Pls advise.

Thanks in advance.