png graphic: insufficient memory to import file.....

[Alexander Witzigmann]

i've got the following error while importing a XML file refers to png in
FrameMaker 7.0 / 7.1. "insufficient memory to import file.....". as
mentioned the xml file opened refers to one particular png graphic which
can be open in regular graphic programs and viewers without any issue.
anyone aware of a particular issue with FrameMaker using png format?

thanks,

alex