diff --git a/src/__init__.mojo b/src/__init__.mojo
index 4762ea5..b5c2f85 100644
--- a/src/__init__.mojo
+++ b/src/__init__.mojo
@@ -1,3 +1,4 @@
+from .util import *
 from .testing_utils import *
 from .level1 import *
 from .level2 import *
diff --git a/src/util.mojo b/src/util.mojo
new file mode 100644
index 0000000..9bd7a3f
--- /dev/null
+++ b/src/util.mojo
@@ -0,0 +1,5 @@
+# error checking blas_error_if(condition, __function_name__, "parameter_name", parameter)
+fn blas_error_if[T: Stringable ](cond: Bool, caller: String, param: String, val: T) raises:
+    if(cond) :
+        raise Error(caller, " Error: ", param, " = ", String(val))
+