If you are using Info Path to develop web forms you might have faced this issue. Follow below steps as described in “Resolution” in order to overcome this issue.
When you try to get data from Data Connection for e.g. web service. You get the following error:
“The amount of data that was returned by a data connection has exceeded the maximum limit that was configured by the server administrator. Form elements, such as drop-down lists may be blank.”
The Default data connection response size if set to 1500kb for Form Services, If the response from the data connection size exceeds the default limit the warning will be shown on screen.
01. Click on General Application Settings in Central Administration
02. Click on Configure InfoPath Forms Services under InfoPath forms Services
03. Change the Response Size in kilobytes (Increase the number).