update version and fix bug that cannot run without cupy

src/orisys/HHD.py

@@ -36,12 +36,13 @@ try:
     CUPY_AVAILABLE = True
     
     # Try to import CuPy streams for parallel execution
-    try:
-        from cupy.cuda import Stream
-        STREAMS_AVAILABLE = True
-    except ImportError:
-        Stream = None
-        STREAMS_AVAILABLE = False
+    if CUPY_AVAILABLE:
+        try:
+            from cupy.cuda import Stream
+            STREAMS_AVAILABLE = True
+        except ImportError:
+            Stream = None
+            STREAMS_AVAILABLE = False
     
     # Create fused elementwise kernel for torque computation
     # Computes cross products and combines them in a single kernel pass
@@ -103,9 +104,9 @@ class nHHD(object):
             raise ValueError("nHHD Solver works only for 2 and 3 dimensions")
 
         self.psolver.prepare(False)  
-        
-        self.stream1 = cp.cuda.Stream()
-        self.stream2 = cp.cuda.Stream() 
+        if CUPY_AVAILABLE:
+            self.stream1 = cp.cuda.Stream()
+            self.stream2 = cp.cuda.Stream() 
     
     # create the 3-component decomposition
     def decompose(self, vfield, verbose=0):