To avoid memory errors on the Logical Host, increase the heap size for the Logical Host to at least 1024 MB as explained in this section.
On the Environment Explorer tab of the Enterprise Designer, select and expand the Logical Host folder.
Right-click the Logical Host, and click Properties.
The Properties dialog box appears. See Increasing Logical Host Heap Size.
Under Configuration > Logical Host Configuration, enter the heap size 1024 in the Heap Size text box.
When you are finished, click OK.