diff --git a/data/maker/prepare/__init__.py b/data/maker/prepare/__init__.py
index e15c63b..ecb47bd 100644
--- a/data/maker/prepare/__init__.py
+++ b/data/maker/prepare/__init__.py
@@ -237,7 +237,7 @@ class Input :
         #
         # @NOTE: For some reason, there is an out of memory error created here, this seems to fix it (go figure)
         #
-        _matrix = np.array([np.zeros(cols.size) for i in np.arange(row_count)])
+        _matrix = np.array([np.repeat(0,cols.size) for i in range(row_count)])
         [np.put(_matrix[i], np.where(cols ==  rows[i])  ,1)for i in np.arange(row_count) if np.where(cols == rows[i])[0].size > 0]
         # else:
         #     _matrix = cp.zeros([row_count,cols.size])