The Host Integration Server Product Team has just released the first Cumulative Update (CU) for HIS 2013.
HIS 2013 CU1 includes fixes for HIS 2013 that were fixed after the release of HIS 2013, including some fixes that were previously released for HIS 2009 and HIS 2010. HIS 2013 CU1 also includes functional improvements for the new Transaction Integrator Configuration Tool as well as for the Microsoft Service for DRDA PowerShell module.
Details on the included fixes can be found in the following Knowledge Base article:
2908834 Cumulative update package 1 for Host Integration Server 2013
You can download HIS 2013 CU1 via the Hotfix Download Available link in the referenced KB article. You need to download the CU1 package that matches the HIS 2013 version (x86 or x64) that you have installed.