For the last few weeks, I've been getting the following indicated error when the client requests additional work units. When you look at the workunit detail in your account it states "can't find input file". Are the splitters failing to write date to the file?

SETI@home 3/31/2011 4:19:49 PM [error] MD5 check failed for 20no10ab.6543.5793.10.10.253
SETI@home 3/31/2011 4:19:49 PM [error] expected 13c864fc0b047a11506d2b236e0e0ec9, got f8a985a6df916e4e44573b434fd562d6
SETI@home 3/31/2011 4:19:49 PM [error] Checksum or signature error for 20no10ab.6543.5793.10.10.253

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Is this happening on all your machines?

Yes, and only when the machines request multiple tasks.

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For the last few weeks, I've been getting the following indicated error when the client requests additional work units. When you look at the workunit detail in your account it states "can't find input file". Are the splitters failing to write date to the file?

SETI@home 3/31/2011 4:19:49 PM [error] MD5 check failed for 20no10ab.6543.5793.10.10.253
SETI@home 3/31/2011 4:19:49 PM [error] expected 13c864fc0b047a11506d2b236e0e0ec9, got f8a985a6df916e4e44573b434fd562d6
SETI@home 3/31/2011 4:19:49 PM [error] Checksum or signature error for 20no10ab.6543.5793.10.10.253

The few times I've seen errors like those, it was actual file corruption during download. I had a bad connection in the phone junction box, it was messing up "everything". Had to replace 20 feet of 50-year-old phone wire.

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Donald
Infernal Optimist / Submariner, retired

Are you running off of a switch or a hub?

Are you running off of a switch or a hub?

All machines are connected to a switch which in turn connects to a cable modem. Have already upgraded the switch firmware. Cable modem firmware is up to date.

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For the last few weeks, I've been getting the following indicated error when the client requests additional work units. When you look at the workunit detail in your account it states "can't find input file". Are the splitters failing to write date to the file?

SETI@home 3/31/2011 4:19:49 PM [error] MD5 check failed for 20no10ab.6543.5793.10.10.253
SETI@home 3/31/2011 4:19:49 PM [error] expected 13c864fc0b047a11506d2b236e0e0ec9, got f8a985a6df916e4e44573b434fd562d6
SETI@home 3/31/2011 4:19:49 PM [error] Checksum or signature error for 20no10ab.6543.5793.10.10.253

To answer the subject question directly, it's not a splitter problem when other hosts can download the WU and crunch it successfully.

Unfortunately, any file which fails the MD5 check is deleted very soon, so it's difficult to check what kind of corruption has happened. The "only when the machines request multiple tasks" aspect is curious. Perhaps it would be worthwhile trying a cc_config.xml file with <max_file_xfers_per_project>1</max_file_xfers_per_project> set as a way of determining if something in the download path is mixing parts of one WU with another.

You might also try <http_1_0>1</http_1_0> just in case your ISP has a proxy which needs that.

                                                                  Joe

I'm thinking it's a networking problem. Have/Can you try taking out the switch and other PCs and just hooking up the machine with the worst problem directly to the cable modem and see if you can duplicate the problem. if not repeat the test with the other machines individually.

For the last few weeks, I've been getting the following indicated error when the client requests additional work units. When you look at the workunit detail in your account it states "can't find input file". Are the splitters failing to write date to the file?

SETI@home 3/31/2011 4:19:49 PM [error] MD5 check failed for 20no10ab.6543.5793.10.10.253
SETI@home 3/31/2011 4:19:49 PM [error] expected 13c864fc0b047a11506d2b236e0e0ec9, got f8a985a6df916e4e44573b434fd562d6
SETI@home 3/31/2011 4:19:49 PM [error] Checksum or signature error for 20no10ab.6543.5793.10.10.253

To answer the subject question directly, it's not a splitter problem when other hosts can download the WU and crunch it successfully.

Unfortunately, any file which fails the MD5 check is deleted very soon, so it's difficult to check what kind of corruption has happened. The "only when the machines request multiple tasks" aspect is curious. Perhaps it would be worthwhile trying a cc_config.xml file with <max_file_xfers_per_project>1</max_file_xfers_per_project> set as a way of determining if something in the download path is mixing parts of one WU with another.

You might also try <http_1_0>1</http_1_0> just in case your ISP has a proxy which needs that.

                                                                  Joe

Thanks for the info, Joe, will try the cc_config.xml and see what happens.

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I'm thinking it's a networking problem. Have/Can you try taking out the switch and other PCs and just hooking up the machine with the worst problem directly to the cable modem and see if you can duplicate the problem. if not repeat the test with the other machines individually.

I download updates to utilities I use that average in the megabytes and never have a problem. Seti work files are 367 kilobytes average. I have MediaCom as an ISP and know that since they started offering VoIP, they run out of IP addresses and lock up their servers.

Thanks for the advice. Thought someone else might be having the same problem but I guess not.

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