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/level1/asum_device.mojo b/src/level1/asum_device.mojo
index 5bbc8b4..9fde31b 100644
--- a/src/level1/asum_device.mojo
+++ b/src/level1/asum_device.mojo
@@ -18,9 +18,6 @@ fn asum_device[
     incx: Int,
     result: UnsafePointer[Scalar[dtype], MutAnyOrigin]
 ):
-    if n < 1 or incx <= 0:
-        result[0] = 0
-        return
 
     var local_tid = thread_idx.x
 
@@ -65,6 +62,9 @@ fn blas_asum[dtype: DType](
     d_res: UnsafePointer[Scalar[dtype], MutAnyOrigin],
     ctx: DeviceContext
 ) raises:
+    blas_error_if["blas_asum", "n < 0"](n < 0)
+    blas_error_if["blas_asum", "incx <= 0"](incx <= 0)
+
     comptime kernel = asum_device[TBsize, dtype]
     ctx.enqueue_function[kernel, kernel](
         n,
diff --git a/src/level1/axpy_device.mojo b/src/level1/axpy_device.mojo
index 953d65a..0626d08 100644
--- a/src/level1/axpy_device.mojo
+++ b/src/level1/axpy_device.mojo
@@ -12,12 +12,6 @@ fn axpy_device[dtype: DType](
     y: UnsafePointer[Scalar[dtype], MutAnyOrigin],
     incy: Int
 ):
-    if (n <= 0):
-        return
-    if (a == 0):
-        return
-    if (incx == 0 or incy == 0):
-        return
 
     var global_i = global_idx.x
     var n_threads = Int(grid_dim.x * block_dim.x)
@@ -36,6 +30,14 @@ fn blas_axpy[dtype: DType](
     incy: Int,
     ctx: DeviceContext
 ) raises:
+    blas_error_if["blas_axpy", "n < 0"](n < 0)
+    blas_error_if["blas_axpy", "incx == 0"](incx == 0)
+    blas_error_if["blas_axpy", "incy == 0"](incy == 0)
+
+    # quick return
+    if(a == 0) :
+        return
+        
     comptime kernel = axpy_device[dtype]
     ctx.enqueue_function[kernel, kernel](
         n, a,
diff --git a/src/level1/copy_device.mojo b/src/level1/copy_device.mojo
index ac44ada..0784174 100644
--- a/src/level1/copy_device.mojo
+++ b/src/level1/copy_device.mojo
@@ -13,10 +13,6 @@ fn copy_device[dtype: DType](
     y: UnsafePointer[Scalar[dtype], MutAnyOrigin],
     incy: Int
 ):
-    if (n <= 0):
-        return
-    if (incx == 0 or incy == 0):
-        return
 
     var global_i = global_idx.x
     var n_threads = Int(grid_dim.x * block_dim.x)
@@ -34,6 +30,12 @@ fn blas_copy[dtype: DType](
     incy: Int,
     ctx: DeviceContext
 ) raises:
+
+    blas_error_if["blas_copy", "n < 0"](n < 0)
+    blas_error_if["blas_copy", "incx == 0"](incx == 0)
+    blas_error_if["blas_copy", "incy == 0"](incy == 0)
+
+    
     comptime kernel = copy_device[dtype]
     ctx.enqueue_function[kernel, kernel](
         n,
diff --git a/src/level1/dot_device.mojo b/src/level1/dot_device.mojo
index 68025d6..87e8d5f 100644
--- a/src/level1/dot_device.mojo
+++ b/src/level1/dot_device.mojo
@@ -19,8 +19,6 @@ fn dot_device[
     incy: Int,
     output: UnsafePointer[Scalar[dtype], MutAnyOrigin],
 ):
-    if n < 1:
-        return
 
     var global_i = block_dim.x * block_idx.x + thread_idx.x
     var n_threads = grid_dim.x * block_dim.x
@@ -59,6 +57,11 @@ fn blas_dot[dtype: DType](
     d_out: UnsafePointer[Scalar[dtype], MutAnyOrigin],
     ctx: DeviceContext
 ) raises:
+    
+    blas_error_if["blas_dot", "n < 0"](n < 0)
+    blas_error_if["blas_copy", "incx == 0"](incx == 0)
+    blas_error_if["blas_copy", "incy == 0"](incy == 0)
+
     comptime kernel = dot_device[TBsize, dtype]
     ctx.enqueue_function[kernel, kernel](
         n, d_x, incx,
diff --git a/src/level1/dotc_device.mojo b/src/level1/dotc_device.mojo
index f4ae13b..c14fac7 100644
--- a/src/level1/dotc_device.mojo
+++ b/src/level1/dotc_device.mojo
@@ -20,8 +20,6 @@ fn dotc_device[
     incy: Int,
     output: UnsafePointer[Scalar[dtype], MutAnyOrigin],
 ):
-    if n < 1:
-        return
 
     var global_i = block_dim.x * block_idx.x + thread_idx.x
     var n_threads = grid_dim.x * block_dim.x
@@ -70,6 +68,10 @@ fn blas_dotc[dtype: DType](
     d_out: UnsafePointer[Scalar[dtype], MutAnyOrigin],
     ctx: DeviceContext
 ) raises:
+    blas_error_if["blas_dotc", "n < 0"](n < 0)
+    blas_error_if["blas_dotc", "incx == 0"](incx == 0)
+    blas_error_if["blas_dotc", "incy == 0"](incy == 0)
+
     comptime kernel = dotc_device[TBsize, dtype]
     ctx.enqueue_function[kernel, kernel](
         n, d_x, incx,
diff --git a/src/level1/dotu_device.mojo b/src/level1/dotu_device.mojo
index 957037a..6d95df1 100644
--- a/src/level1/dotu_device.mojo
+++ b/src/level1/dotu_device.mojo
@@ -20,8 +20,7 @@ fn dotu_device[
     incy: Int,
     output: UnsafePointer[Scalar[dtype], MutAnyOrigin],
 ):
-    if n < 1:
-        return
+
 
     var global_i = block_dim.x * block_idx.x + thread_idx.x
     var n_threads = grid_dim.x * block_dim.x
@@ -70,6 +69,11 @@ fn blas_dotu[dtype: DType](
     d_out: UnsafePointer[Scalar[dtype], MutAnyOrigin],
     ctx: DeviceContext
 ) raises:
+
+    blas_error_if["blas_dotu", "n < 0"](n < 0)
+    blas_error_if["blas_dotu", "incx == 0"](incx == 0)
+    blas_error_if["blas_dotu", "incy == 0"](incy == 0)
+    
     comptime kernel = dotu_device[TBsize, dtype]
     ctx.enqueue_function[kernel, kernel](
         n, d_x, incx,
diff --git a/src/level1/iamax_device.mojo b/src/level1/iamax_device.mojo
index 4a70e45..aba2f53 100644
--- a/src/level1/iamax_device.mojo
+++ b/src/level1/iamax_device.mojo
@@ -89,6 +89,11 @@ fn blas_iamax[dtype: DType](
     d_res: UnsafePointer[Scalar[DType.int64], MutAnyOrigin],
     ctx: DeviceContext
 ) raises:
+
+    blas_error_if["blas_iamax", "n < 0"](n<=0)
+    blas_error_if["blas_iamax", "incx <= 0"](incx <= 0)
+
+
     comptime kernel = iamax_device[TBsize, dtype]
     ctx.enqueue_function[kernel, kernel](
         n, d_v, incx,
diff --git a/src/level1/nrm2_device.mojo b/src/level1/nrm2_device.mojo
index 6627f3a..df9ae23 100644
--- a/src/level1/nrm2_device.mojo
+++ b/src/level1/nrm2_device.mojo
@@ -58,6 +58,9 @@ fn blas_nrm2[dtype: DType](
     d_out: UnsafePointer[Scalar[dtype], MutAnyOrigin],
     ctx: DeviceContext
 ) raises:
+    blas_error_if["blas_nrm2", "n < 0"](n < 0)
+    blas_error_if["blas_nrm2", "incx <= 0"](incx <= 0)
+    
     comptime kernel = nrm2_device[TBsize, dtype]
     ctx.enqueue_function[kernel, kernel](
         n, d_x, incx, d_out,
diff --git a/src/level1/rot_device.mojo b/src/level1/rot_device.mojo
index d4bf07b..63162be 100644
--- a/src/level1/rot_device.mojo
+++ b/src/level1/rot_device.mojo
@@ -17,8 +17,7 @@ fn rot_device[
     c: Scalar[dtype],
     s: Scalar[dtype]
 ):
-    if (n < 1):
-        return
+
 
     var global_tid = block_idx.x * block_dim.x + thread_idx.x
     var n_threads = grid_dim.x * block_dim.x
@@ -43,6 +42,15 @@ fn blas_rot[dtype: DType](
     s: Scalar[dtype],
     ctx: DeviceContext
 ) raises:
+    blas_error_if["blas_rot", "n < 0"](n < 0)
+    blas_error_if["blas_rot", "incx == 0"](incx == 0)
+    blas_error_if["blas_rot", "incy == 0"](incy == 0)
+
+    
+    # quick return 
+    if(n == 0 or (c == 1 and s == 0)) :
+        return
+
     comptime kernel = rot_device[dtype]
     ctx.enqueue_function[kernel, kernel](
         n,
diff --git a/src/level1/rotm_device.mojo b/src/level1/rotm_device.mojo
index 940b5c0..e290130 100644
--- a/src/level1/rotm_device.mojo
+++ b/src/level1/rotm_device.mojo
@@ -17,8 +17,6 @@ fn rotm_device[
     param: UnsafePointer[Scalar[dtype], MutAnyOrigin]
 ):
     var flag = param[0]
-    if (n < 1):
-        return
 
     var idx = block_idx.x * block_dim.x + thread_idx.x
     var n_threads = grid_dim.x * block_dim.x
@@ -63,6 +61,12 @@ fn blas_rotm[dtype: DType](
     d_param: UnsafePointer[Scalar[dtype], MutAnyOrigin],
     ctx: DeviceContext
 ) raises:
+    blas_error_if["blas_rotm", "n < 0"](n < 0)
+    blas_error_if["blas_rotm", "incx == 0"](incx == 0)
+    blas_error_if["blas_rotm", "incy == 0"](incy == 0)
+
+    if(n == 0 ): 
+        return
     comptime kernel = rotm_device[dtype]
     ctx.enqueue_function[kernel, kernel](
         n,
diff --git a/src/level1/scal_device.mojo b/src/level1/scal_device.mojo
index e35f801..d16f069 100644
--- a/src/level1/scal_device.mojo
+++ b/src/level1/scal_device.mojo
@@ -10,12 +10,6 @@ fn scal_device[dtype: DType](
     x: UnsafePointer[Scalar[dtype], MutAnyOrigin],
     incx: Int,
 ):
-    if (n <= 0):
-        return
-    if (a == 0):
-        return
-    if (incx == 0):
-        return
 
     var global_i = global_idx.x
     var n_threads = Int(grid_dim.x * block_dim.x)
@@ -32,6 +26,11 @@ fn blas_scal[dtype: DType] (
     incx: Int,
     ctx: DeviceContext
 ) raises:
+
+    blas_error_if["blas_scal", "n < 0"](n < 0)
+    blas_error_if["blas_scal", "incx <= 0"](incx <= 0)
+
+
     comptime kernel = scal_device[dtype]
     ctx.enqueue_function[kernel, kernel](
         n, a, d_x, incx,
diff --git a/src/level1/swap_device.mojo b/src/level1/swap_device.mojo
index b880ccc..43b1041 100644
--- a/src/level1/swap_device.mojo
+++ b/src/level1/swap_device.mojo
@@ -11,10 +11,7 @@ fn swap_device[dtype: DType](
     y: UnsafePointer[Scalar[dtype], MutAnyOrigin],
     incy: Int
 ):
-    if (n <= 0):
-        return
-    if (incx == 0 or incy == 0):
-        return
+
 
     var global_i = global_idx.x
     var n_threads = Int(grid_dim.x * block_dim.x)
@@ -34,6 +31,10 @@ fn blas_swap[dtype: DType](
     incy: Int,
     ctx: DeviceContext
 ) raises:
+    blas_error_if["blas_swap", "n < 0"](n < 0)
+    blas_error_if["blas_swap", "incx == 0"](incx == 0)
+    blas_error_if["blas_swap", "incy == 0"](incy == 0)
+
     comptime kernel = swap_device[dtype]
     ctx.enqueue_function[kernel, kernel](
         n,
diff --git a/src/util.mojo b/src/util.mojo
new file mode 100644
index 0000000..26e22e7
--- /dev/null
+++ b/src/util.mojo
@@ -0,0 +1,8 @@
+
+fn blas_error_if[caller: String, cond_str: String](cond: Bool) raises: 
+    """
+    Function raises an error describing the bad paramters passed to caller.
+    """
+    if(cond) :
+        raise Error("Error: {} in {}".format(cond_str, caller))
+