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I can not open the sequences when working with gap. I am only able to look a the base pairs, but I can not look directly at the sequence when I double click on it.
I would be very pleased if someone could help me,
thank you very much in advance,
German Cancer Research Center Heidelberg
I assume you mean the trace files when you say the sequence?
This probably stems from either your trace search path (gap4 uses the TRACE_PATH environment variable, also adjustable from the options menu) or from the gap4 database not actually knowing the trace filenames at all. It's hard to say which is causing the error.
Does it also whinge in a terminal window (assuming you launched it from a terminal) about unable to find a filename?