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Getting a blank screen in WebGUI after logging in - after 722 kernel upgrade

Nov 06, 2016 at 07:04 PM

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Hi all

Our previous version of WebGUI wasn't working so well (couldn't download excel etc using it) and we were advised to upgrade the kernel from 721 to the 'latest' version. I couldn't see any WebGUI fixes in the oldest 721 kernel but 722 is full of them. As we are running NW 701 (SP5) we couldn't go any higher than a 722 kernel, so we went for that and applied the latest kernel patch available, 214.

Now the WebGUI doesn't work at all! Well - it displays the logon page but after entering the username and password it displays nothing - just a blank screen. There's lots of OSS notes about blank screens and lots of different things to try - I've tried them all:

Regenerate INTERNAL services from SE80 and re-ran SIAC_PUBLISH_ALL_INT

Checked Note 1521043 "ICF system logon: No logon screen"

Call transaction SICF. Go to the service that displays the blank page when you call it. Note that the logon data may also be stored in an alias or a higher-level ICF node. Double-click the service, go to the "Error Pages" tab page and choose the "Logon Errors" tab page. Select "System Logon" and choose "Configuration". Under "Logon Layout and Procedure" in the "SAP Implementation" area, select the "Signature Design" screen. The error occurs only if the "NetWeaver Classic" is set as the screen. (fixed in SAPKB70108; we are on SAPKB70105)

After publishing again go to transaction SITSPMON and clear the template and mime cache also.

Check webgui service configuration in SICF, make sure the "GUI link" is set to "Yes" on the first tab.

Try: a) Delete the content from DIR_DATA/icmandir/last_update_ITS.txt b) Be sure that you have set: icm/HTTP/file_access_0 = PREFIX=/sap/public/icmandir/,DOCROOT=$(DIR_ICMAN_ROOT),ARCHIVE=$(DIR_EXECUTABLE)/ITS.SAR c) Stop the system d) Go to the DIR_DATA/icmandir folder and delete the "its" directory e) Restart the system f) Delete the web browser cache g) Invalidate the server cache: SMICM -> Goto -> HTTP Plug-in -> Server Cache -> Invalidate Globally

Checked note 698329 "Integrated ITS, WEBGUI/IAC logon fails"

The ONLY thing I've found is from the last one, and that's when I test the mimes service (/sap/public/bc/its/mimes) it short dumps with STRING_OFFSET_TOO_LARGE.

Also ran Fiddler and I get a 404 'service not available' error and it says favicon.ico is not available..?

There's a few forum posts about the STRING_OFFSET_TOO_LARGE dump related to WebGUI but they all seem to be around themes and creating other services - I'm not doing anything with themes/other services though, just trying to use the standard WebGUI!

Neither could I find anything relevant to the favicon.ico issue...

Any ideas?

Ross

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3 Answers

Ross Armstrong Nov 15, 2016 at 08:38 PM
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I didn't get anywhere with this so had to raise an incident with SAP; they basically came back and told me that WebGUI wasn't supported on any browsers with our low SPS level (NW701 SPS5) and pointed me at this:

https://support.sap.com/content/dam/library/ssp/infopages/pam-essentials/TIP/NW70PAMBrow.pdf


I.e. we need to upgrade to at least SPS9 but far better (for newer IE versions) to SPS17.

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Ah yeah, sps5 for NW7.01 is very, very old. All kinds of things are probably not working well in that system. Lots of improvements came with sps13, and a bunch more with sps17, and not just for WebGUI.

We're using NW 7.01 sps17 in our shop, but still with kernel 7.21. We do use the WebGUI, but only for those users who insist -- at this time I still recommend SAPGUI. However, the WebGUI works for most things, but not, as you mentioned, for upload/download.

I also get why they wouldn't want to bother updating an older system that is only around for audit purposes.

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Former Member Nov 28, 2016 at 09:24 AM
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HI Roos,


your Problem is described in Note: 2368978, You need to upgrade your Kernel to the latest support pack as mentioned in Note: 2198998(SAP Kernel 7.22 disp+work (DW.SAR) patch forecast).


Regards,

Manjunath

,

HI Roos,

your Problem is described in Note: 2368978, You need to upgrade your Kernel to the latest support pack as mentioned in Note: 2198998(SAP Kernel 7.22 disp+work (DW.SAR) patch forecast).

Regards,

Manjunath

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Hi

Thanks for the response, but as I'd already said:

"we couldn't go any higher than a 722 kernel, so we went for that and applied the latest kernel patch available, 214"

I.e. had already followed this note.

I see that SAP have since released a new version, 217. However, looking at the webgui fixes from 215-217, they don't appear to be valid.

Regards
Ross

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Cristiano Hansen
Nov 28, 2016 at 09:19 PM
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Hello Ross,


Please be sure to have set:

~webgui_new_design 1

in the GUI Configuration.

This is required to have the new Unified Rendering WEBGUI version in use for your 7.01 release.

Note that kernel 7.21 will not hold any new developments, so adopting kernel 7.22 is a good choice.

Republihsing services is no longer required, as the new WEBGUI is "template-free" - no SE80 involvement.


You can follow SAP KBA 2234414 to be sure that the WEBGUI configuration is ok - even if you are not facing the symptoms described.


Kind regards,
Cris

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Thanks Chris... webgui_new_design already set (and unset and reset a few times with various combinations of settings!), I'm afraid it didn't help.

I've already followed note 2234414 (and related note 1575271) I'm afraid, no joy.

I put the Support Package option to the client and they've now decided to give up with WebGUI and go for SAP GUI instead (this is a copy of an older system for audit purposes, so they're not interested in the unnecessary hassle/costs of upgrading)

Thanks anyway all!

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Hello Ross,

The big impact here - to prevent the WEBGUI from working - is the lower SPS. There are ABAP coding that build the WEBGUI frame, that probably is not new enough to cope with the kernel changes. There are corrections that could not be put as correction instructions - so no SNOTE use too. The only alternative, as the bottom line - and as an additional difficulty for the issue - is the SP upgrade.

Sorry for not having a card up my sleeve to share.

All the best,

Cris

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