diff --git a/src/clstepcore/STEPattribute.cc b/src/clstepcore/STEPattribute.cc
index a495f0818..73a7d77fc 100644
--- a/src/clstepcore/STEPattribute.cc
+++ b/src/clstepcore/STEPattribute.cc
@@ -1052,6 +1052,14 @@ bool operator == ( const STEPattribute & a1, const STEPattribute & a2 ) {
     return false;
 }
 
+/** evaluate the equality of two attributes
+ * ignores _error and refCount, since those are ancillary
+ *  \return true if not equal
+ */
+bool operator != ( const STEPattribute & a1, const STEPattribute & a2 ) {
+  return !( a1 == a2 );
+}
+
 /// return true if the attr descriptor is identical
 bool sameADesc( const STEPattribute & a1, const STEPattribute & a2 ) {
     return a1.aDesc == a2.aDesc;
diff --git a/src/clstepcore/STEPattribute.h b/src/clstepcore/STEPattribute.h
index 211524341..be7ea20fa 100644
--- a/src/clstepcore/STEPattribute.h
+++ b/src/clstepcore/STEPattribute.h
@@ -262,13 +262,11 @@ class SC_CORE_EXPORT STEPattribute {
         STEPattribute( const class AttrDescriptor & d, SCLundefined * p );
 
         /// return true if attr types and values match
-        friend bool operator == ( const STEPattribute & a1, const STEPattribute & a2 );
-        friend bool operator != ( const STEPattribute & a1, const STEPattribute & a2 ) {
-            return !( a1 == a2 );
-        }
+        SC_CORE_EXPORT friend bool operator == ( const STEPattribute & a1, const STEPattribute & a2 );
+        SC_CORE_EXPORT friend bool operator != ( const STEPattribute & a1, const STEPattribute & a2 );
 
         /// return true if aDesc's match (behavior of old operator==)
-        friend bool sameADesc ( const STEPattribute & a1, const STEPattribute & a2 );
+        SC_CORE_EXPORT friend bool sameADesc ( const STEPattribute & a1, const STEPattribute & a2 );
 };
 
 #endif
diff --git a/src/clstepcore/sdaiSelect.h b/src/clstepcore/sdaiSelect.h
index bb4dde0c5..9235b1b8c 100644
--- a/src/clstepcore/sdaiSelect.h
+++ b/src/clstepcore/sdaiSelect.h
@@ -90,8 +90,6 @@ class SC_CORE_EXPORT SDAI_Select {
                                            int addFileId = 0,
                                            const char * currSch = 0 ) = 0;
 
-        virtual SDAI_Select & operator =( const SDAI_Select & ) = 0;
-
         int set_null();
         int is_null();
 
diff --git a/src/exp2cxx/classes.c b/src/exp2cxx/classes.c
index af6a56085..9654e6c05 100644
--- a/src/exp2cxx/classes.c
+++ b/src/exp2cxx/classes.c
@@ -1071,7 +1071,7 @@ void ENTITYhead_print( Entity entity, FILE * file ) {
     strncpy( entnm, ENTITYget_classname( entity ), BUFSIZ );
     entnm[BUFSIZ-1] = '\0';
 
-    fprintf( file, "\nclass %s  :  ", entnm );
+    fprintf( file, "\nclass SC_SCHEMA_EXPORT %s  :  ", entnm );
 
     /* inherit from either supertype entity class or root class of
        all - i.e. SDAI_Application_instance */
diff --git a/test/cpp/schema_specific/CMakeLists.txt b/test/cpp/schema_specific/CMakeLists.txt
index e7fb21f5c..9a0274b17 100644
--- a/test/cpp/schema_specific/CMakeLists.txt
+++ b/test/cpp/schema_specific/CMakeLists.txt
@@ -16,6 +16,9 @@ FUNCTION( add_schema_dependent_test name sdai_lib exe_args )
 
     add_executable( tst_${name} "${name}.cc" )
     set_target_properties( tst_${name} PROPERTIES COMPILE_FLAGS "-I${sdai_src_path} ${ARGV3}" EXCLUDE_FROM_ALL ON )
+    if(NOT "${ARGV4}" MATCHES "NONE")
+        DEFINE_DLL_IMPORTS( "tst_${name}" "${ARGV4}" )
+    endif(NOT "${ARGV4}" MATCHES "NONE")
     target_link_libraries( tst_${name} sdai_${sdai_lib} ${ARGV4} )
     add_test( NAME build_cpp_${name}
               WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
@@ -39,7 +42,8 @@ SET(SC_ENABLE_TESTING OFF)
 SET(SC_ENABLE_TESTING ON)
 
 add_schema_dependent_test( "aggregate_bound_runtime" "array_bounds_expr"
-                           "${SC_SOURCE_DIR}/test/p21/test_array_bounds.p21" )
+                           "${SC_SOURCE_DIR}/test/p21/test_array_bounds.p21"
+                           "" "stepcore")
 
 #can't use the macro for this one because it depends on the test above and needs WILL_FAIL
 add_test( NAME test_aggregate_bound_runtime_FAIL1