Hi, have anybody encountered the error "LibraryFunction::notensor"?

my library function works well, but when I put it in a compiled function, it generate above error.

@halirutan are you around? Could you help me with my library link problem?

My First Halftone (tm)

@xslittlegrass Well, this is the most simple thing to find out, if you don't know the answer.

<< CCodeGenerator`
f = Compile[{{a, _Complex, 0}, {b, _Complex, 0}}, a*b];
CCodeStringGenerate[f, "fun"]

and you get

mreal S0 = mcreal(C0_0);
mreal S1 = mcimag(C0_0);
mreal S2 = mcreal(C0_1);
mreal S3 = mcimag(C0_1);
mcreal(C0_2) = S0 * S2 - S1 * S3;
mcimag(C0_2) = S0 * S3 + S1 * S2;

where C0_0 is a, C0_1 is b and C0_2 is the result of the multiplication.

What a surprise, isn't it? :-)

@xslittlegrass I was around some minutes ago then... but it was 5:17 in the morning here and sometimes even I have to sleep.

Could you solve your problem?

@Pickett You around? Would you mind to explain how your bug-tool works? I mean, it's hosted at dropbox, but can you make that the users sees an webpage automatically created on dropbox?

@halirutan Webpage hosting on Dropbox is just an HTML file in the public folder. It can refer to any assets in the public folder with local URLs.

@Pickett yeah.. saw it when I looked at your code.

So you just created this page once and it is static?

@halirutan Unfortunately :( I was going to deploy it to Wolfram Cloud, but I didn't think it was worth it. I could still have cron job run the Mathematica script every now and then in the background, to update the HTML page.

@Pickett The thing why I looked at it is for instance this bug I mentioned yesterday

@Pickett It's restricted to Linux, so it is not enough to have the version number only. We probably an easy way to give additional information

@halirutan I recommend using Mr. Wizard's suggestion and appending any other information to the end of the sentence. "persisting" in his sentence could be used as a keyword to extract the sentence programmatically like "fixed" is now.

The best thing would be to wrap the meta sentence with f.e. <span data-version-introduced="10.1" data-version-persisting="10.2" data-operating-system="Linux">sentence for users</span> but I've been convinced that people won't use it consistently.

@Pickett Yeah, that's too much trouble when writing the question.

@halirutan You worked so hard! I solved my problem, I changed it to constant passing and it works. Thanks anyway!

@MichaelHale @MichaelE2 Someone around to whom English is the first language?

@halirutan I'm here.

How can I say this more politely?

> With this in mind, would you please re-read the detailed post here and probably mark this as bug in your database?

It sounds even for me a bit demanding and harsh

(I got a reply from support and it's just, well, a useless answer)

@halirutan I would call that already polite and certainly not harsh. You could go even more polite with something like "would you please consider re-reading..."

@MichaelHale Ahh right.. I forgot about "consider".

Thanks very much

No prob

@halirutan The "probably mark" sounds a bit awkward to me....I got interrupted by my daughter. Give me a sec.

@MichaelE2 using "consider marking this as bug" doesn't work now that we already shot that bullet :-)

@halirutan "and rethink whether it should be marked a bug in your database." (I would've said "reconsider" instead of "rethink.")

@halirutan I assume the reply was from some relatively new employee who is relaying information from the actual development team.

@MichaelE2 the "be marked a bug .." sounds strange to a German mind.

But it sounds English now that I see it.

@halirutan One can put "as" before the "a", but without sounds more formal. English speakers are fairly lax.

@MichaelE2 Yeah.. that's why I made a second example to show what this all is about. Another 20 min spend..

@MichaelE2 Right, "as a" sounds very German too.

@MichaelE2 Anyway, thank you very much.

@halirutan You're welcome.

@halirutan If you want to make a "harsh" point, it is sometimes less confrontational to frame it in terms of your "feelings." E.g., "I feel this is important to my work and find it increasingly dissatisfying to work within the limitations this issue with X imposes on me."

@MichaelE2 Yes, sounds right and I would read it like that.

@MichaelE2 I'm reading about 70% of my books in English (when they are written by some English author, I quite like to read the original thing). I believe I have a pretty good feeling most of the time. What I do miss is to speak to someone who is a native speaker. In science, almost everyone is not a native speaker here (at least it seems so) which makes the whole situation worse.

You here accents all the day. I have a buddy when I play battlefield who is from UK.. but I don't consider the war-chat a good practice :-)

@halirutan I teach at a US college and last semester I had 2n+1 students, of which n+1 were Chinese, 1 was Korean, and 1 was Indonesian.

@MichaelE2 I didn't wanted to come as racist, because I'm not, but Indian and Chinese accents are probably the worst. I can even imitate them beside having a German accent myself

@MichaelE2 I mean, the situation is pretty strange because I'm basically reading and working in English the whole day. All publications are English, all programming related stuff is English. Therefore, I push myself to be really good at the language itself. On the other hand, English is so simple and gray compared to German. I don't want to know how Geothes Faust sounds in English.

@halirutan The basic sound components of language vary greatly around the world. Forming and hearing the sounds are learned in our first couple of years (as infants); after that it takes a lot of work. Chinese and European languages, for example, are far apart in their sound elements.

@MichaelE2 Yeah, I read some publications about this myself. Quite interesting

@MichaelE2 German, and especially my local accent is very very close to English I would say.

So the forming of the sounds is pretty easy and I can differentiate a lot of accents.

I hear very clearly German, Italian, French, and Russian accents when they speak English.

But I do hear clear differences between London and northern Britain too (I had a buddy in Edinburgh)

@halirutan I think the British Museum has recordings of different dialects around England. I can understand almost none of what they say. The differences in vocabulary were surprising to me. But that's going away with TV etc and greater mobility.

I took a linguistics course that explained the variety of sounds of languages all over the world (and how to denote them, which I've forgotten).

@MichaelE2 yeah, I know most of the stuff from Comedian shows and movies that I watch only in German when my wife is around and forces me to. There are a great variety of different accents. I learned a lot from George Carlin, Ron White, I just love Kathleen Madigan and Bill Bailey.

(Btw, Bill Bailey played in Black Books which is hilarious after some episodes)

@halirutan We have no TV except a few broadcast programs. My daughter once she could walk, wouldn't let us watch. So we got rid of cable. We hardly ever turn the set on. She's 13 now and still has no interest in TV.

@MichaelE2 No TV here either :-)

Just a beamer and a lot of DVDs but we only watch once or twice a week

(I'm not sure how shitty the TV program is in US, but here, I couldn't stand it anymore around 2002 and I threw it out)

We'll watch some things on the internet. When school's in session, it seems we have little time to sit and watch for a couple of hours. We spend half of summer with my in-laws, hiking, swimming, playing music. Little time to watch then, too.

I don't really speak German. I taught myself to read it for my Ph.D. Now and then I might read short things, mainly poems, in German. Short, so I have time to look up words I don't know.

@halirutan Yeah, I'm not sure either. I hear about "critically acclaimed" shows from time to time. They seem rare. And on cable. The "reality" shows really turned me off. I suppose they're still around.

@MichaelE2 Reality shows were the one that gave me the rest too. Sometimes, when I'm with friends, they even make it an evening-event to watch the worst of these shows.. where you can barely look and feel ashamed all the time (it's called "Fremdschämen" here).

@halirutan I never saw enough of them to really know how they worked. They seemed to have little to do with reality, except that the people really degraded themselves and really felt unenviable and sometimes ugly emotions.

@MichaelE2 It's called scripted reality here, because there is nothing really real.