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HP OpenVMS Systemsask the wizard |
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The Question is: I'm getting an error when I try to run a COBOL compiled exe program. %IMGACT-F-INIIMGCIR, cannot initialize image involved in a circularity I have never seen this error before and I'm wondering if you could shed some light on it?? Thanks, Scott Hughes The Answer is : The image activator is required to activate images and to call image initialization routines (LIB$INITIALIZE psects) in the appropriate order -- INIIMGCIR indicates that the image activator cannot determine the order, and has in fact found a loop. The image activator accomplishes "image fixup" in two passes. On the first pass, address references within each image are relocated, based on where each image is located in process virtual address space. On the second pass, references between images are fixed up. By the, the process virtual address for all routines and static data have been resolved, so order is insignificant. However, the image activator carefully maintains a list of images by reference order -- which is unrelated to load order. Only images with initialization routines need be represented in this list. Circular references in images means the image activator cannot determine a correct ordering for this list. For example, if an initialization routine in image A calls a routine in image B, then the initialization routine for B must be called before the initialization routine in A. The image activator cannot determine if the initialization routine in A might actually call any routine in B -- much less whether any routine called might be sensitive to initialization having been run. So, OpenVMS assumes the worst case and produces an error, rather than generating what could be sporadic results. In other words, even if you think there are no dependencies in the code, real dependencies can exist. Even when there is no actual circular dependency, there could be some dependencies on activation order.
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