diff --git a/src/copapy/__init__.py b/src/copapy/__init__.py
index c8031d3..d8712be 100644
--- a/src/copapy/__init__.py
+++ b/src/copapy/__init__.py
@@ -460,21 +460,19 @@ class Target():
         if var_type == 'float':
             if lengths == 4:
                 value = struct.unpack(en + 'f', data)[0]
-                assert isinstance(value, float)
-                return value
             elif lengths == 8:
                 value = struct.unpack(en + 'd', data)[0]
-                assert isinstance(value, float)
-                return value
             else:
-                raise ValueError(f"Unsupported float length: {lengths}")
+                raise ValueError(f"Unsupported float length: {lengths} bytes")
+            assert isinstance(value, float)
+            return value
         elif var_type == 'int':
             if lengths in (1, 2, 4, 8):
                 value = int.from_bytes(data, byteorder=self.sdb.byteorder, signed=True)
                 assert isinstance(value, int)
                 return value
             else:
-                raise ValueError(f"Unsupported int length: {lengths}")
+                raise ValueError(f"Unsupported int length: {lengths} bytes")
         else:
             raise ValueError(f"Unsupported variable type: {var_type}")
 
diff --git a/src/copapy/stencil_db.py b/src/copapy/stencil_db.py
index 58305c5..34a7965 100644
--- a/src/copapy/stencil_db.py
+++ b/src/copapy/stencil_db.py
@@ -34,7 +34,11 @@ def translate_relocation(relocation_addr: int, reloc_type: str, bits: int, r_add
         patch_offset = relocation_addr
         return patch_entry(RelocationType.RELOC_RELATIVE_32, patch_offset, r_addend)
     else:
-        raise Exception(f"Unknown: {reloc_type}")
+        print('relocation_addr: ', relocation_addr)
+        print('reloc_type:      ', reloc_type)
+        print('bits:            ', bits)
+        print('r_addend:        ', r_addend)
+        raise Exception(f"Unknown relocation type: {reloc_type}")
 
 
 def get_ret_function_def(symbol: pelfy.elf_symbol) -> str: