In the case of failure of a standard run of Crunch - the structure does not come out - try the following:
crunch code deter 1 1Inspect deter.cout and try to maximize the average E-value in the matrices and/or the number of strong, independent reflections.
crunch code clearNext, type
crunch code deter 1 1and now, when the system asks if you would like to use default values for the matrix construction, type 'u'.
Choose a different, preferably lower, number of matrices and/or a different order for the matrices. The minimum number allowed is 1. The number of matrices you may use is prescribed, not just any positive number will do. If you type a number here which is unacceptable Crunch will substitute the nearest acceptable one. The order of the matrices you may choose to be any ODD number.
Try to choose your parameters to fit the requirements. E-average should be high. The number of strong, independent reflections should be at least about 2.5 times the number of independent atoms you are looking for. A significant number of symmetry equivalents - including Friedels - should be present. If you succeed in finding a set of matrices which looks promising, - high average E, enough strong independent reflections while containing a sufficient amount of redundancy - try to solve the structure again using the 'options' try or 'collect'.
crunch code recycle n n+10or use 20 in stead of 10. n is the number of the trial chosen. If this does not work and other trials looking better than most others exist, try them in the same way.
If all this does not work give up. Crunch will not solve this structure, at least not for you. If you like, contact the authors, giving full details of what you have done so far.