.. _error-code-evrf015:

.. meta::
   :description: AWS Neuron SDK Graph Compiler error code documentation for error EVRF015.

NCC_EVRF015
===========

**Error message**: The compiler encountered a custom call instruction with a target name that is not recognized.

The Neuron compiler currently recognizes the following custom call targets:

 - AwsNeuronErf
 - AwsNeuronGelu
 - AwsNeuronGeluApprxTanh
 - AwsNeuronGeluBackward
 - AwsNeuronSilu
 - AwsNeuronSiluBackward
 - AwsNeuronRmsNorm
 - AwsNeuronSoftmax
 - AwsNeuronSoftmaxBackward
 - AwsNeuronCollectiveMatmul
 - AwsNeuronIntMatmult
 - AwsNeuronArgMax
 - AwsNeuronArgMin
 - AwsNeuronTopK
 - AwsNeuronDropoutMaskV1
 - AwsNeuronCustomNativeKernel
 - AwsNeuronCustomOp
 - AwsNeuronDevicePrint
 - ResizeNearest
 - ResizeBilinear
 - ResizeNearestGrad
 - AwsNeuronLNCShardingConstraint
 - AwsNeuronTransferWithStaticRing
 - AwsNeuronModuleMarkerStart-Forward
 - AwsNeuronModuleMarkerStart-Backward
 - AwsNeuronModuleMarkerEnd-Forward
 - AwsNeuronModuleMarkerEnd-Backward
 - NeuronBoundaryMarker-Start
 - NeuronBoundaryMarker-End

Erroneous code example:

.. code-block:: python

    def lowering(ctx, x_val):
        result_type = ir.RankedTensorType(x_val.type)
        # This target name will not be recognized by HandleCustomCall
        return hlo.CustomCallOp(
            [result_type],
            [x_val],
            call_target_name="UNRECOGNIZED_TARGET",
            has_side_effect=ir.BoolAttr.get(False),
        ).results


Use a supported custom call target:

.. code-block:: python

    def lowering(ctx, x_val):
        result_type = ir.RankedTensorType(x_val.type)
        return hlo.CustomCallOp(
            [result_type],
            [x_val],
            call_target_name="AwsNeuronSilu",
            has_side_effect=ir.BoolAttr.get(False),
            backend_config=ir.StringAttr.get(""),
            api_version=ir.IntegerAttr.get(ir.IntegerType.get_signless(32), 2),
        ).results