The problem seemed to start with 65 Rosetta Computation Errors for various tasks, I then started getting the following, for example:

| | [error] Can't create HTTP response output file projects/boinc.bakerlab.org_rosetta/minirosetta_graphics_3.78_windows_intelx86.exe
| Rosetta@home | Backing off 02:23:12 on download of minirosetta_graphics_3.78_windows_intelx86.exe
| | [error] Can't create HTTP response output file projects/boinc.bakerlab.org_rosetta/minirosetta_graphics_3.78_windows_intelx86.exe
| Rosetta@home | Backing off 03:55:01 on download of minirosetta_graphics_3.78_windows_intelx86.exe
| Rosetta@home | update requested by user
| Rosetta@home | Fetching scheduler list
| Rosetta@home | Master file download succeeded
| Rosetta@home | Sending scheduler request: Requested by user.
| Rosetta@home | Reporting 64 completed tasks
| Rosetta@home | Requesting new tasks for CPU
| Rosetta@home | Scheduler request completed: got 79 new tasks
| Rosetta@home | Sending scheduler request: To fetch work.
| Rosetta@home | Requesting new tasks for CPU
| | [error] Can't create HTTP response output file projects/ boinc.bakerlab.org_rosetta/ minirosetta_graphics_3.78_windows_intelx86.exe
| Rosetta@home | Backing off 00:02:35 on download of minirosetta_graphics_3.78_windows_intelx86.exe
| Rosetta@home | Started download of 20171101DHRppBinder_X16_S16293_S640_data.zip
| Rosetta@home | Started download of flags_rb_10_30_78183_121207__t000__2_C1_robetta
| Rosetta@home | Scheduler request completed: got 79 new tasks
| Rosetta@home | Finished download of flags_rb_10_30_78183_121207__t000__2_C1_robetta
| Rosetta@home | Started download of input_rb_10_30_78183_121207__t000__2_C1_robetta.zip
| Rosetta@home | Finished download of input_rb_10_30_78183_121207__t000__2_C1_robetta.zip
| Rosetta@home | Started download of 171106HW_DHRppBinder_S4528_S41170_H_data.zip
| Rosetta@home | Finished download of 20171101DHRppBinder_X16_S16293_S640_data.zip
| Rosetta@home | Started download of 20171101DHRppBinder_X16_S16293_S456_data.zip
| Rosetta@home | Finished download of 20171101DHRppBinder_X16_S16293_S456_data.zip
| Rosetta@home | Started download of thiofix_Fixloop_d2t1m_thio_b0058_0005_0002_0001_0001.0757_data.zip
| Rosetta@home | Finished download of thiofix_Fixloop_d2t1m_thio_b0058_0005_0002_0001_0001.0757_data.zip
| Rosetta@home | Started download of G028900_1-120_TEST_v02_t000__krypton.zip
| Rosetta@home | Finished download of 171106HW_DHRppBinder_S4528_S41170_H_data.zip
| Rosetta@home | Started download of G028900_1-120_TEST_v02_t000__krypton.flags
| Rosetta@home | Finished download of G028900_1-120_TEST_v02_t000__krypton.flags
| Rosetta@home | Started download of 20171101DHRppBinder_X16_S16293_S150_data.zip
| Rosetta@home | Finished download of G028900_1-120_TEST_v02_t000__krypton.zip
| Rosetta@home | Started download of tj_11_2_juncA_

Etc., etc.

The above continues until all but two tasks are downloaded but none start because they seem to be waiting for these remaining two tasks, the two .exe tasks, to be downloaded, which never happens.
If I then abort the two downloading .exe tasks, all of the finished downloads switch to "Downloads Failed".

| Rosetta@home | Resetting file projects/boinc.bakerlab.org_rosetta/minirosetta_graphics_3.78_windows_intelx86.exe: result aborted via GUI
| Rosetta@home | Resetting file projects/boinc.bakerlab.org_rosetta/minirosetta_graphics_3.78_windows_x86_64.exe: result aborted via GUI

If I then ask for more work, the above repeats.


The set-up is:

| | Starting BOINC client version 7.8.3 for windows_x86_64
| | log flags: file_xfer, sched_ops, task
| | Libraries: libcurl/7.47.1 OpenSSL/1.0.2g zlib/1.2.8
| | Data directory: C:ProgramDataBOINC
| | Running under account Leonari
| | CUDA: NVIDIA GPU 0: GeForce 310M (driver version 342.01, CUDA version 6.5, compute capability 1.2, 512MB, 424MB available, 70 GFLOPS peak)
| | Host name: Leonari-Toshiba
| | Processor: 8 GenuineIntel Intel(R) Core(TM) i7 CPU Q 740 @ 1.73GHz [Family 6 Model 30 Stepping 5]
| | Processor features: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss htt tm pni ssse3 cx16 sse4_1 sse4_2 popcnt syscall nx lm vmx smx tm2 pbe
| | OS: Microsoft Windows 10: Professional x64 Edition, (10.00.14393.00)
| | Memory: 5.93 GB physical, 8.93 GB virtual
| | Disk: 931.02 GB total, 638.61 GB free
| | Local time is UTC +0 hours
| | VirtualBox version: 5.0.18
| | Rosetta@home | URL https://boinc.bakerlab.org/rosetta/; Computer ID 2531546; resource share 35
| | Reading preferences override file
| | Preferences:
| | max memory usage when active: 4252.27 MB
| | max memory usage when idle: 6074.67 MB
| | max disk usage: 100.00 GB
| | (to change preferences, visit a project web site or select Preferences in the Manager)
| | Running CPU benchmarks
| | Suspending computation - CPU benchmarks in progress
| | FP benchmark ran only 1.968750 sec; ignoring
| | FP benchmark ran only 1.578125 sec; ignoring

Any idea as to what is going on, please?

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I have downgraded from BOINC 7.8.3 to 7.6.33 to make sure that the problem is not because of the latest BOINC upgrade. Unfortunately, the BOINC downgrade has made no difference. I still cannot do any Rosetta tasks!
Is there anyone out there or am I raising this issue in the wrong forum?

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It works for me (BOINC 7.8.3). I would detach from Rosetta and re-attach.

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Since those are executable files you have problems with, it could be antivirus program that blocks BOINC from creating the files.

Or it could be that the files already exists (partially downloaded) but BOINC can't open them for writing (to continue downloading). You could check C:ProgramDataBOINCboinc.bakerlab.org_rosetta to see if the files exist and if they do, remove them.

Thanks, Juha. I took your and Jim's advice. It now works.

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