cubeit attribute fix (#5268)

* cubeit attribute fix

* Update changelog

CHANGELOG.md

@@ -63,6 +63,7 @@ release.
 - Fixed <i>findfeatures</i> use of projected mosaics with correct check for <b>TargetName</b> in the Mapping labels. [#4772](https://github.com/DOI-USGS/ISIS3/issues/4772)
 - Fixed a bug in the <i>cnetwinnow</i> test that did not clean/remove it during test runs.
 - Fixed <i>findfeatures</i> instantiation and use of projection classes to correctly return geometry data from projected images and mosaics. [#4772](https://github.com/DOI-USGS/ISIS3/issues/4772)
+- Fixed `cubeit` attribute error to allow attribute specification on the output cube filename [#5234](https://github.com/DOI-USGS/ISIS3/issues/5234)
 
 ## [8.0.0] - 2023-04-19
 

isis/src/base/objs/Cube/Cube.cpp

@@ -629,11 +629,16 @@ namespace Isis {
 
     initLabelFromFile(cubeFileName, (access == "rw"));
 
+    try {
       Isis::CubeAttributeInput att(cubeFileName);
       if(att.bands().size() != 0) {
         vector<QString> bands = att.bands();
         setVirtualBands(bands);
       }
+    } catch(IException& e) {
+      // Either the cube is an output cube that has already been opened or 
+      // there is an exception parsing and adding an attribute
+    }
 
     // Figure out the name of the data file
     try {