Chapter 3
Developing Your Application
PCI-Based MXI-2 Interfaces for Windows 2000/NT/Me/98
3-10
ni.com
Debugging
NI Spy and VISAIC are useful utilities for identifying the causes of
problems in your application.
NI Spy tracks the calls your application makes to National Instruments
programming interfaces, including NI-VISA, NI-VXI, and NI-488. NI Spy
highlights functions that return errors, so during development you can
quickly spot which functions failed during a program’s execution. NI Spy
can log the calls your program makes to these drivers so you can check
them for errors at your convenience, or use the NI Spy log as a reference
when discussing the problem with National Instruments technical support.
Figure 3-4 shows an example of a normal error returned from a call to
viMemAlloc
when no memory has been shared.
Figure 3-4.
NI-Spy
