LINGO could not allocate enough memory to store the solution report to the model. System resources must be very low in order to receive this message. Exit any other applications and try again. If the error still occurs, you may have set the model generator’s working memory area to be too large. You can adjust the generator’s memory allocation downward on the General tab of the Solver|Options command's dialog box. If all else fails, you can use the Solver|Solution command to request smaller solution reports for individual variables.