A map service containing labels with horizontal alignment set to Full, returns the error message, "Service does not exist or is inaccessible in REST.".
This issue is not reproducible in the current release of the software. If user encounters this issue, please contact Esri Technical Support (for customers in the United States) or Esri distributor (for customers outside the United States) to resolve this issue.
解决办法
Change the horizontal alignment to anything other than Full.