There is no restriction on the size of templates used by transactions run using the 3270 Bridge. However, templates that exceed 32K of storage are processed differently from smaller templates, and to process larger templates you must specify a path that maps to a program name of DFHWBTTB in the HTTP request. See URL path components for 3270 display applications for more information.
Note that templates that require less than 32K of storage can expand to greater than 32K if symbol substitution significantly increases the amount of data.
When the template is generated, DFHWBTLG issues a message containing the amount of storage required for each template to be read from the DFHHTML data set. Use these messages to determine if you should use a program name of DFHWBTTA or DFHWBTTB.