The HLU APIs were designed so that a descriptive error message is generated when a problem is encountered. The Error class can be used to trap and print these messages. However, there are some cases where errors can occur which go unreported. This module will point out such cases as we discover them. A value is changed in a resource file, but the resulting graphic, or other object, does not reflect the change.
Resource files describes the way user resource files are named for an application.
There could be a spelling error in the assignment path of that resource in the resource file. Errors of these kinds in a resource file are not reported. To see if the problem is of this kind, set the resource in question directly in your HLU code as shown in Three ways to set resources . Compile and run your code using nhlcc or nhlf77 and watch for an error message. If there is no error message and the plot now reflects the change in the resource value, then there is indeed a pathname error in defining that resource in your resource file.