Dear Axel, dear all, sorry for the short explanation. I paste here the e-mail I sent to Jon yesterday and his answers. We (at ISE) tried several configurations. Actually we installed the ESP-r version 11.8 on a Debian machine with 64bits. We compile it both with the suggested library gcc4.1.2 and the gcc4.3. In both cases we have problems. The problems are: 1) When I go into "composition", "construction materials", and I click on one surface composition (for example "external wall") I can not see in the graphical interface the description of the different layer that compose the construction I selected (I have a line of several squares). But I have to say that in the ".con" file I have the correct values for thickness, conductivity, density ecc.. The problem seem to be in the graphical interface. "Jon answer: The construction materials has probably already been fixed but has not yet made it into the development_branch (hopefully any day now)." 2) When I open the ".cfg" file I am not able to click on the "image control" to change the view point (nothing happens) and the same I can not "capture" the picture of the model (something fails after 2 seconds and the interface closed). 3) Last problem is in the *DATABASES description. I don't know why but Esp "automatically" inserts in the ".cfg" file of my model a new line in the *DATABASES list. The line is the following: *mscldb /usr/local/esru/esp-r/<div class="im">databases/mscomp.db1 I never see this file and I also do not need it (I guess). But if I leave it I receive this massage: "Unknown entry format... *DATABASES I can click on "continue" and aswer yes to continue reading the configuration. Now, if a delete it everything works good. But ESP-r after a change in the model try to create this "*mscldb" link again. We also try to install the ESP-r version 11.7 (using gcc4.3). We had again the problem number 2) but not the problem number 1). Moreover we have the following problem: 4) When we enter in the "database maintainance", "optical properties", "browse/edit" and than I click on a Optical property set I received strange lines instead of the correct graphs representing the Direct transmission, the reflection and the absorption of the optical set. "JON answer: The drawing of the optical properties is also probably a 64 bit issue that you are the first to notice." I think it is all. I hope that you can understand what I wrote and that you can help us solving this problem. Please let me know if something is unclear. Best regards Francesco</div> -- Dr. Francesco Frontini, MEng PhD in Buildings Engineering ---------------------------------------- Fraunhofer Institut für Solare Energiesysteme ISE Heidenhofstr. 2, 79110 Freiburg, Germany M1: [+39] 333-3097826 M2: [+49] (0)1522-1624691 Phone: [+49] (0)7614588-5358 FAX: [+49] (0)7614588-9358 @1: <a href="mailto:francesco.frontini@ise.fraunhofer.de">francesco.frontini@ise.fraunhofer.de</a> @2: <a href="mailto:francesco.frontini@polimi.it">francesco.frontini@polimi.it</a> ----------------------------------------