******************************************************************************** conan install grpc/1.37.1@ --build=grpc --profile=C:\J\w\BuildSingleReference/13724/1936b99a-21a1-44cc-b452-0b223b8a738f/profile.txt ******************************************************************************** Configuration: [settings] arch=x86_64 arch_build=x86_64 build_type=Debug compiler=Visual Studio compiler.runtime=MTd compiler.version=14 os=Windows os_build=Windows [options] [build_requires] [env] Traceback (most recent call last): File "c:\python36\lib\site-packages\conans\client\command.py", line 2164, in run method(args[0][1:]) File "c:\python36\lib\site-packages\conans\client\command.py", line 536, in install lockfile_node_id=args.lockfile_node_id) File "c:\python36\lib\site-packages\conans\client\conan_api.py", line 93, in wrapper return f(api, *args, **kwargs) File "c:\python36\lib\site-packages\conans\client\conan_api.py", line 560, in install_reference lockfile_node_id=lockfile_node_id) File "c:\python36\lib\site-packages\conans\client\manager.py", line 59, in deps_install lockfile_node_id=lockfile_node_id) File "c:\python36\lib\site-packages\conans\client\graph\graph_manager.py", line 120, in load_graph apply_build_requires=apply_build_requires) File "c:\python36\lib\site-packages\conans\client\graph\graph_manager.py", line 255, in _resolve_graph graph_lock=graph_lock) File "c:\python36\lib\site-packages\conans\client\graph\graph_manager.py", line 365, in _load_graph apply_build_requires=apply_build_requires) File "c:\python36\lib\site-packages\conans\client\graph\graph_manager.py", line 286, in _recurse_build_requires self._binary_analyzer.evaluate_graph(graph, build_mode, update, remotes, nodes_subset, root) File "c:\python36\lib\site-packages\conans\client\graph\graph_binaries.py", line 389, in evaluate_graph self._evaluate_node(node, build_mode, update, remotes) File "c:\python36\lib\site-packages\conans\client\graph\graph_binaries.py", line 176, in _evaluate_node self._process_node(node, pref, build_mode, update, remotes) File "c:\python36\lib\site-packages\conans\client\graph\graph_binaries.py", line 242, in _process_node self._evaluate_cache_pkg(node, package_layout, pref, metadata, remote, remotes, update) File "c:\python36\lib\site-packages\conans\client\graph\graph_binaries.py", line 95, in _evaluate_cache_pkg assert node.prev, "PREV for %s is None: %s" % (str(pref), metadata.dumps()) AssertionError: PREV for openssl/1.1.1k:f27dcd2d5e453cb01f9324a959461903ce8116a0 is None: {"recipe": {"revision": "3555e93beb1e5904c8f0689e8fce854e", "remote": "conan-center", "properties": {}, "checksums": {"conan_export.tgz": {"md5": "d0587ca892d0bd5bf081dbf239b8625b", "sha1": "5db047b4baff21dab93fce7848b87b3709a60cab"}, "conanmanifest.txt": {"md5": "6d420827071cb5796e956fb863157975", "sha1": "5eaacfc942684d3a57aca665f8cc76eaab87de67"}, "conanfile.py": {"md5": "ebb1509f039052f2efb29da284bee974", "sha1": "588b1bbace64d7dd0bcd9be73836bf79c7914565"}}}, "packages": {"f27dcd2d5e453cb01f9324a959461903ce8116a0": {"revision": null, "recipe_revision": null, "remote": null, "properties": {}, "checksums": {}}}} ERROR: PREV for openssl/1.1.1k:f27dcd2d5e453cb01f9324a959461903ce8116a0 is None: {"recipe": {"revision": "3555e93beb1e5904c8f0689e8fce854e", "remote": "conan-center", "properties": {}, "checksums": {"conan_export.tgz": {"md5": "d0587ca892d0bd5bf081dbf239b8625b", "sha1": "5db047b4baff21dab93fce7848b87b3709a60cab"}, "conanmanifest.txt": {"md5": "6d420827071cb5796e956fb863157975", "sha1": "5eaacfc942684d3a57aca665f8cc76eaab87de67"}, "conanfile.py": {"md5": "ebb1509f039052f2efb29da284bee974", "sha1": "588b1bbace64d7dd0bcd9be73836bf79c7914565"}}}, "packages": {"f27dcd2d5e453cb01f9324a959461903ce8116a0": {"revision": null, "recipe_revision": null, "remote": null, "properties": {}, "checksums": {}}}}