The FTP facility transfers data directly to and from a file, so is only restricted by the size of the storage being used. The HTTP and HTTPS facilities use an ESL string as a buffer, which has a theoretical limit of 2GB, but is really limited to the size of memory available to the ESL Application, which is set by the parameter PRGMAX (default is 32MB). The data received from a server has to be placed in a buffer before being converted into an ESL string. Currently the receive buffer has a defined size of 200KB. An error will be reported in the ESL errorlog if the buffer space is exceeded. Please contact the Help Desk if you need to exceed the 200KB limit or if there appears to be any truncation of the received message.