Why do I get the error message "??? Error Using==> javaObject" when I try to use Java objects that call native methods?

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I have a JAR file that includes a Java class that calls a native method. After making this class available to MATLAB by adding the full path and filename of the JAR file to classpath.txt, I get the following error message when I try to invoke the Java object constructor in MATLAB:
jo = javaObject('com.freddiemac.fir.finance.TermStructure')
??? Error using ==> javaObject
No class com.freddiemac.fir.finance.TermStructure can be located on Java
class path.

Accepted Answer

MathWorks Support Team
MathWorks Support Team on 18 Oct 2013
In the case where your Java object calls a native method, this error message indicates that you do not have your system path set correctly.
Native methods are implemented in shared libraries or dynamic-link libraries, and if the location of the shared libraries is not set in the environment variable "Path", a java.lang.UnsatisfiedLinkError error occurs and the object is not created in MATLAB.
For information on setting your system path, see the Related Solution listed below.

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