Failing the ideal semantics, it is suggested that the length be measured along the major axis of the line. For all other lines, the major axis is the y axis. XSetDashes can generate BadAlloc , BadGC , and BadValue errors. The server failed to allocate the requested resource or server memory. A value for a GContext argument does not name a defined GContext.
Some numeric value falls outside the range of values accepted by the request.
Unless a specific range is specified for an argument, the full range defined by the argument's type is accepted. Any argument defined as a set of alternatives can generate this error.