The Ovi Store has a file size limitation of 350Mb for sis files.
However, playing with making a big sis file, I noticed that signsis starts failing when the unsigned sis packages hits around 250Mb.
The error message is: "memory error, cannot increase stream buffer size."
At first I thought it was my build machine running out of RAM, but on further investigation that does not seem to be the case.
The signsis.exe process itself approaches 1Gb in size, but does not appear to go over.
The signsis, from NokiaQtSDK appears to be:
SIGNSIS Version 5
A utility for signing Software Installation (SIS) files.
Copyright (c) 2007 Symbian Software Ltd. All rights reserved.
I'll continue to investigate, but perhaps this is a known issue.
Any hints, workarounds?