"Unable to access ntx* memory" in Windows 2000 Event Viewer


The error message "Unable to access ntx* memory" appears in the Event Viewer and the ports are not available.




  • There is a memory conflict with another device.


  • The BIOS has a setting to reserve a memory block for an ISA adapter but this has not been done.


  • The reserved memory block is too small.



  • To resolve a memory conflict, change the memory setting in the Properties of the adapter to a free block of available memory.


  • Reserve a block of memory in the system BIOS for the adapter.


  • The memory block size varies with the adapter. An Xe requires 8K, while the Xr, Xem, C/X and EPC/X require 32K.
Last updated: Aug 23, 2017

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