Error -4502 and -1257 on I4GL 4.00.UC2

I am using I4GL 4.00.UC2 on SCO OpenServer 5.0.2. I have these 2 errors from time to time when a 4gi program of 1 Mb is loading. The finderr give us a clue about -4502 error. -4502 The 4GL program has run out of runtime data space memory. You will have to reduce the data space required by the program. = Review the size of large character variables and the dimensions of = arrays. It may be necessary to split the program up into separate = programs that load separately, i f that is possible. -1257 Operating system cannot fork process for back end. This is an internal error. Look for operating system messages that = might give more detail. After verifying that it is not the result of a = system limit or local problem, note all the circumstances and contact = Informix Technical Support. About this one it is not a system limit nor a local one. Does anyone have any suggestion ? Thanks in advance Evelio Mart=EDnez af.informatica@vlc.servicom.es