Add a helper error message when the tensor index is not found.
Add a helper error message when the tensor index is not found.

PiperOrigin-RevId: 316155846
Change-Id: I0754d7520e9ee3ec352fd26691581ac05f2caa3e

cxxgtxy/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,gautam1858/tensorflow,davidzchen/tensorflow,gautam1858/tensorflow,Intel-tensorflow/tensorflow,paolodedios/tensorflow,gautam1858/tensorflow,annarev/tensorflow,gautam1858/tensorflow,petewarden/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow-pywrap_saved_model,yongtang/tensorflow,aldian/tensorflow,frreiss/tensorflow-fred,Intel-tensorflow/tensorflow,petewarden/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,frreiss/tensorflow-fred,annarev/tensorflow,tensorflow/tensorflow,frreiss/tensorflow-fred,cxxgtxy/tensorflow,aam-at/tensorflow,yongtang/tensorflow,freedomtan/tensorflow,tensorflow/tensorflow-pywrap_saved_model,karllessard/tensorflow,paolodedios/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,Intel-Corporation/tensorflow,annarev/tensorflow,gautam1858/tensorflow,tensorflow/tensorflow,paolodedios/tensorflow,paolodedios/tensorflow,frreiss/tensorflow-fred,tensorflow/tensorflow-experimental_link_static_libraries_once,karllessard/tensorflow,davidzchen/tensorflow,gautam1858/tensorflow,yongtang/tensorflow,tensorflow/tensorflow-pywrap_saved_model,freedomtan/tensorflow,karllessard/tensorflow,davidzchen/tensorflow,davidzchen/tensorflow,aldian/tensorflow,tensorflow/tensorflow,karllessard/tensorflow,freedomtan/tensorflow,sarvex/tensorflow,sarvex/tensorflow,frreiss/tensorflow-fred,tensorflow/tensorflow,Intel-tensorflow/tensorflow,aam-at/tensorflow,Intel-tensorflow/tensorflow,petewarden/tensorflow,davidzchen/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,annarev/tensorflow,cxxgtxy/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,paolodedios/tensorflow,gautam1858/tensorflow,annarev/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,Intel-Corporation/tensorflow,Intel-tensorflow/tensorflow,cxxgtxy/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,aldian/tensorflow,frreiss/tensorflow-fred,sarvex/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,davidzchen/tensorflow,tensorflow/tensorflow-pywrap_saved_model,Intel-Corporation/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,paolodedios/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,petewarden/tensorflow,petewarden/tensorflow,Intel-Corporation/tensorflow,gautam1858/tensorflow,freedomtan/tensorflow,aldian/tensorflow,karllessard/tensorflow,paolodedios/tensorflow,gautam1858/tensorflow,sarvex/tensorflow,tensorflow/tensorflow-pywrap_saved_model,tensorflow/tensorflow-experimental_link_static_libraries_once,tensorflow/tensorflow-pywrap_saved_model,aam-at/tensorflow,aam-at/tensorflow,tensorflow/tensorflow,frreiss/tensorflow-fred,paolodedios/tensorflow,sarvex/tensorflow,davidzchen/tensorflow,tensorflow/tensorflow-pywrap_saved_model,aam-at/tensorflow,karllessard/tensorflow,tensorflow/tensorflow,tensorflow/tensorflow-pywrap_saved_model,karllessard/tensorflow,tensorflow/tensorflow,yongtang/tensorflow,Intel-Corporation/tensorflow,davidzchen/tensorflow,petewarden/tensorflow,aam-at/tensorflow,tensorflow/tensorflow-pywrap_saved_model,frreiss/tensorflow-fred,aam-at/tensorflow,davidzchen/tensorflow,aam-at/tensorflow,annarev/tensorflow,freedomtan/tensorflow,cxxgtxy/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,Intel-Corporation/tensorflow,aldian/tensorflow,annarev/tensorflow,karllessard/tensorflow,Intel-Corporation/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,davidzchen/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,freedomtan/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,Intel-tensorflow/tensorflow,yongtang/tensorflow,annarev/tensorflow,petewarden/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,tensorflow/tensorflow-pywrap_tf_optimizer,annarev/tensorflow,aam-at/tensorflow,Intel-tensorflow/tensorflow,frreiss/tensorflow-fred,tensorflow/tensorflow-pywrap_tf_optimizer,freedomtan/tensorflow,yongtang/tensorflow,tensorflow/tensorflow-pywrap_saved_model,yongtang/tensorflow,frreiss/tensorflow-fred,karllessard/tensorflow,tensorflow/tensorflow,cxxgtxy/tensorflow,freedomtan/tensorflow,petewarden/tensorflow,aam-at/tensorflow,Intel-tensorflow/tensorflow,yongtang/tensorflow,frreiss/tensorflow-fred,aldian/tensorflow,gautam1858/tensorflow,gautam1858/tensorflow,tensorflow/tensorflow,sarvex/tensorflow,aldian/tensorflow,freedomtan/tensorflow,cxxgtxy/tensorflow,sarvex/tensorflow,annarev/tensorflow,karllessard/tensorflow,freedomtan/tensorflow,aam-at/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,tensorflow/tensorflow-pywrap_saved_model,yongtang/tensorflow,frreiss/tensorflow-fred,karllessard/tensorflow,aam-at/tensorflow,freedomtan/tensorflow,davidzchen/tensorflow,freedomtan/tensorflow,davidzchen/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,yongtang/tensorflow,petewarden/tensorflow,gautam1858/tensorflow,sarvex/tensorflow,petewarden/tensorflow,tensorflow/tensorflow,Intel-Corporation/tensorflow,paolodedios/tensorflow,paolodedios/tensorflow,cxxgtxy/tensorflow,tensorflow/tensorflow,paolodedios/tensorflow,Intel-tensorflow/tensorflow,aldian/tensorflow,annarev/tensorflow,petewarden/tensorflow,Intel-tensorflow/tensorflow,yongtang/tensorflow,Intel-tensorflow/tensorflow,petewarden/tensorflow