"invalid checksum" error downloading Photoshop 5.1

How do I solve this issue? Have tried downloading Photoshop 5.1 numerous times and keep getting an invalid checksum error when it completes and wont launch ... Also at this point the extracting bar on the download manager just freezes.

And more specifically? Operating system? Browser? System specs? Could be an issue with temporary disk space required for the extraction, could be that some security tool is interferring, could be that your network connection produces errors... Impossible to even guess without more info.
Mylenium

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Invalid Checksum Error for Photoshop Elements 10 installation

I have tried installing Photoshop Elements 10 on my Macbook but I got an "invalid checksum" error (saying that the following disk images couldn't be opened). Was there a previous solution to this type of problem?

That response is not at all helpful. I have no idea what you were referring to, but there is no pale yellow bar at the top of the forum when I am looking at it now.
In the future, consider posting a URL or something else that will continue to be relevant and useful in a persistent way. Perhaps typing a sentence or two about what's going on if you know. If it seems obvious to you, that doesn't mean it will be in the future to others having the same problem.

"Invalid checksum" when downloading photoshop trial

I downloaded the download assistant, and then tried to download the 30 day free trial of photoshop, and after several hours of downloading it came up with: The following disk images couldn't be opened - DesignPremium_CS5_5 invalid checksum.... what do I do now?? I thought I could try downloading it again but it won't let me now that the other one has almost downloaded..

It is possible that the download is corrupt. You can go to Applications>Utilities>Disk Utility and turn off the checksum feature. It is located under the Disk Utility Menu and then Preferences. I would recommend turning it back on though after you are done. If you still have difficulties though you will need to download the install files again.

Error Downloading Photoshop Touch for phone

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Could you try the following…
Go to Settings>Apps>All>Google Play Store>Clear Cache & Clear Data
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I have downloaded the 10.4.3 combo update 4 times on two different computers and get a checksum error every time. Downloads of Xcode, which is a far larger file, have been error free. I have a fiber optic DSL line on Verizon.
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Gerry
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You did not mention how you are downloading the update: by browser, what browser, etc.
If you are using a browser to download the update, try a different browser. Also try downloading the update through Software Update instead of using a browser (or vice-versa.)

Invalid checksum when downloading & installing elements 10 trial

see http://forums.adobe.com/message/4293531#4293531 from another user who's apparently having exactly the same issues.
however, the "answer" provided there appears to be irrelevant. first and foremost, I returned to the computer to find this message, so I didn't "force" it to stop extracting. when I restarted the computer and then the download assistant, I was unable to re-download because it's already on the computer, got the checksum error again, and the download assistant has been stuck in extracting and can't even be force quit.
not giving me the warm fuzzies here peeps...
and because of my work schedule, I won't have any more time to waste on this until next weekend. time to buy from another company perhaps? this is ridiculous.
running on Lion 10.7.4
tried downloading on my windows 7 box, but stopped when I saw that the upgrade price was the same as the full purchase price.

If you are running Snow Leopard or Lion OSX, navigate to Disk utility->Preferences. Uncheck "verify checksums" and then install
If they install successfully, please go back to the Disk utility-> Preferences option and reselect "verify checksums".

Error downloading Photoshop Elements.

I am trying to download a trial version Photoshop Elements 12 to compare it with Lightroom 5.
I downloaded Lightroom 5 yesteday and it worked fine and is running, but when I try to load Elements it starts to install an updated Adobe download assistant ver.1.2.6 then gives the message
" Sorry an error has occured, This application cannot be enstalled because this installer has been mis-configured. Please contact the application author for assistance. "
Is there anyway around this fault?

One way around the fault would be to skip the download assistant and download the trial version directly thru the page linked below.
Be sure to follow the steps outlined in the Note: Very Important Instructions section on the download pages at this site and have cookies enabled in your browser or else the download will not work properly.
Photoshop/Premiere Elements 12:
http://prodesigntools.com/photoshop-elements-12-direct-download-links-premiere.html
Alternatively, while it is not a way around the fault, you might be able to tackle it head-on...
Troubleshoot Adobe Download Assistant
http://helpx.adobe.com/creative-suite/kb/troubleshoot-download-assistant.html

Session State Protection invalid Checksum errors show valid checksum

Hi,
I am investigating Session Sate Prtection to let me make my appications more secure.
I have created a simple Report / Form pair that allows me to open an item for edditing.
I have set the Application to Session State Protection 'Enabled' and and my form page to Page Access Prtection 'Arguments Must Have Checksum'.
From my report page I click on the edit icon for a row and I get the edit page with the url:
f?p=126:3:7115846938209895::::P3_WORK_PACKAGE_ID:1179&cs=3CC0C97D3A8B114D2E40EDF158C0AECFB
If I then manually manipulate this url, to change my P3_WORK_PACKAGE_ID from 1179 to 1180, to:
f?p=126:3:7115846938209895::::P3_WORK_PACKAGE_ID:1180&cs=3CC0C97D3A8B114D2E40EDF158C0AECFB
I get an error of:
Error The checksum computed on the request, clear cache, argument names, and argument values (P3_WORK_PACKAGE_ID1180 [01BE394775DB7B5A861BEA77B6637A46] ) did not match the checksum passed into the show procedure (CC0C97D3A8B114D2E40EDF158C0AECFB).
All well and good, but it tells me what the checksum should be. I can now update the url to use the displayed checksum to make the url:
f?p=126:3:7115846938209895::::P3_WORK_PACKAGE_ID:1180&cs=301BE394775DB7B5A861BEA77B6637A46
the form opens for P3_WORK_PACKAGE_ID 1180.
How do I stop the error message telling my how to bypass the checksum security?
Thanks,
Martin

I am not sure but maybe this detailed message is coming if you are logged in to Apex and otherwise it is showing more general error message with no checksum?

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I'm receiving the following error when I try to mount the beta dmg:
Running OS X 10.6.8. I've redownloaded twice, but it has not changed. Ideas?

Others are clearly installing it successfully, so you're clearly getting corruption in the file during download. It's a BIG file.
Check all the components of your network, but it's possible something in the network outside your control is at fault.
Have you compared the downloads you've received each time against one another? It would be telling if you were to find them different from one another.
-Noel

Photoshop trial - invalid checksum

iMac 2.4GHz Core 2 Duo
OS X 10.6.8
4Gb ram
>900Gb free
I've downloaded the trial 4 times now, different times of the day. Keep getting invalid checksum after downloading. Disk Utility is unable to verify, with the exact same CRC32 on the last three files (I deleted the first one). Same errors every time:
From the CRC it looks like I get the exact same file every time.
I routinely download >1Gb files daily, >8Gb files weekly (on another computer) and checksums match. Should prove my ISP/Internet connection is not to blame as one suggested solution (use another ISP). I could use that computer to do the download but it's Windows and I want the the Mac version.
IS THERE A DIRECT LINK TO DOWNLOAD THE TRIALS?
I've reset Safari, I've deleted ADA prefrences and cache, I've cold booted, I save the file in different locations in my user folder, still get the same CRC each time.

Ramfade you mentioned you have removed the preferences and cache. Can you please confirm if you have completed the steps listed in Solution 1 of Troubleshoot Adobe Download Assistant - http://helpx.adobe.com/creative-suite/kb/troubleshoot-download-assistant.html#main_Solutio n_1.
I ran into this issue when a download was interrupted unexpectedly. Once I completed the steps in solution 1 and reinitiated the download I was able to download the trial successfully.
You might also want to try a wired connection or a different Internet connection while trying to download. Perhaps there is a server between you and the download server which is causing your difficulties at the moment.

I'm having trouble installing 4.4 due to error, "invalid checksum"

I have a new iMac, but same problem was happening on my macbook. Every time I try to install 4.4, I get this error. I even unselected validate checksums in disk utilities, still failed to install.
this file is referenced with the "invalid checksum" error.....Lightroom_4_LS11_mac_4_4(2).dmg
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Chris

Download it again.

Flash Builder 4.7 Mac DMG Invalid Checksum

When I download the FB 4.7 for mac from here and try to open it on Mountain Lion I get an "Invalid checksum" error.
Here's the link I'm using once I login:
http://www.adobe.com/cfusion/entitlement/index.cfm?event=custom&loc=EN_US&sku=FS0003374&e= labs_flashbuilder4-7

Please validate the checksum of your installers against below values
flashbuilder4-7_p1_mac_082712.dmg
E9DBA2C8673E97A6A82C4F09382EEBCF
flashbuilder4-7_p1_win32_082712.exe
D62A9AF1D08EE6838E43B473ACC13BEE
flashbuilder4-7_p1_win64_082712.exe
42A96084BB12F481F17293548707E1FA
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Invalid Checksum when trying to update MAC OS X 10.6.4

Hi all. I own a 15 inch laptop mac i purchased in 2009. I have recently realised that my MAC software has not been updating or installing correctly. I tried to manually download the software 10.6.5 ( as i currently have 10.6.4) and it came back with an invalid checksum error. I retried the download several times and got the same error. I also tried other downloads and also got the invalid checksum error. (.DWG files).
Another thing that seemed strange was that i had been trying to download 'star walk app' for my iphone and also a jamie oliver recipe app however these files seemed to keep restarting their download due to errors.
I have done some research and the possible issues i have come across are:
- possible internet connection error. This doesnt seem to be the problem as i can stream youtube etc with no issues..
- possible RAM error. How do i check this is the problem without purchasing new RAM chip?
- corrupt download. Cant be this due to all my files being corrupt.
Can anyone help me further with trying to solve this issue?
I have been so happy with changing to the Apple life and now i am starting to regret it as i am finding it near impossible to repair my laptop....
Any help is appreciated, Thanks

If you think your Mac is having hardware problems, I'd run the diagnostics that came with your Mac. If the diagnostics came on a separate disc, run them by holding down the "C" key while booting with that disc in the drive. If you only have one "system restore" disc, hold down the "D" key while booting with that disc in the drive.

INVALID CHECKSUM: Motorola SBG6580 wireless modem router and software updates (10.7.4)

Tried to install 10.7.4 via software update dropdown on my MacMini over ethernet on my home computer network, failed. Downloaded Combo Client 10.7.4 update from apple.com. Downloaded fine. Failed to mount with invalid checksum error. Tried to download on Win7 Dell laptop on my same home network via Wi-Fi, and copied to MacMini via USB flashdrive. Copied ok, but mounting returned invalid checksum again. Went to work, downloaded Combo Client 10.7.4 onto USB flashdrive, came home, copied it, mounted and installed just fine!
So, kept trying to download Combo Client from apple.com on my home MacMini. Kept failing, invalid checksum. Did this about 20 times during a few days, and actually got two of them to mount without the checksum error. Realized that something in my network was failing, intermittently.
Figured at this point it was either the Motorola SBG6580 modem wireless router or Comcast cable ISP service.
Went to best buy and bought a new Motorola SurfBoard SBG6580. Installed it, provisioned it with Comcast. Took about 20 mins with Comcast pushing over the same new Motorola firmware that was released in MID FEB 2012. I think it is 3.3.1. Tried to download Combo Client and invalid checksum again. Installed a new Motorola SurfBoard SB6121 modem (which has a very different firmware BTW) and it download and mounted the Combo Client 10.7.4 update just fine!
Realized it was the firmware that was causing it, not a broken modem.
Comcast pushes over cable automatically new firmware that is given to them by Motorola. Apparently no did a thorough check large DMG files that require a checksum and it is therefore somehow corrupting them when downloading. Earlier this year the firmware was updated 3.1 to 3.3.1 then Comcast pulled it and downgraded all SBG6580 back to 3.1. Then in mid Feb they reuploaded 3.3.1 firmware. That is the one causing the problems.
You can either wait it out till they push a new one that fixes it, and have all your large DMG files transferred from another internet connection and copy them over, or just get rid of that horrible SBG6580. That is what I did and now using a Motorola SB6121 modem with a Cisco EA2700 wireless routher.
Let me know if any of you are also experiencing this issue and if/when Comcast/Motorola will fix it.

No, nothing custom that I did. Besides turning off the WPS thing as a possible security problem (we dont need it anyway) and setting the wireless passwords/SSID/channel stuff, everything is as it was factory or changed by Comcasts profile.
It's obvious if you replaced the SBG6580 with a two-peice combo and the problem went away, that it seems to be with the SBG6580. Just weird to me becuase a problem like that would almost seem more like a hard disk or web browser problem. TCP/IP has a checksum/retransmission layer or protocol built in, if short or defective packets show up, they would be sent again.
I mean I've seen like cheap 24 port 10/100mb switches running at 100% throughput, to the point they reboot. Anything connected to them stops or slows down but generally get going where they left off, unless the connection got severed.
I'm just saying a bad iso or dmg file, had to had bytes changed or missing, like the web browsers buffer or a bad block write on the disk drive saving it. There was a lot of talk about the SBG6580 on dslreports and comcast discussion groups, would be interesting to see if anyone else mentioned it for that model.

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I'm trying to download and install the new Xcode 2.4 from connect.apple.com, but when I try opening the DMG after downloading it, I get an error during the verification step: invalid checksum
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No, no special utilities. I tried Firefox, OmniWeb, and I even SSHed to a Linux box and used Lynx to download the DMG, then SCPed it back to my Mac. I still got invalid checksum errors.
However, after rebooting my Mac, I was suddenly able to mount the DMG!
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"invalid checksum" error downloading Photoshop 5.1

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