我需要更新一些軟體包，建議我更新所有軟體包，我這樣做了（正在進行中）。但現在我無法再編譯，我收到諸如“pdftex.def not found”之類的錯誤。是因為更新過程尚未完成嗎？我現在真的很害怕我的文檔被損壞了...
2017-04-24 18:23:20 +0000 Warning tlu_ipctask[94383] TLDownload::get_file: response error: 500 read timeout
2017-04-24 18:32:44 +0000 Warning tlu_ipctask[94383] TLDownload::get_file: response error: 500 read timeout
2017-04-24 18:51:22 +0000 Warning tlu_ipctask[94383] TLDownload::get_file: response error: 500 read timeout
2017-04-24 19:00:49 +0000 Warning tlu_ipctask[94383] tlmgr: action update returned an error; continuing.
2017-04-24 19:03:13 +0000 Warning tlu_ipctask[94383] tlmgr: An error has occurred. See above messages. Exiting.
2017-04-24 19:03:15 +0000 Error tlu_ipctask[94383] *** ERROR *** exit status of pid = 94384 was 1