Why is Studio 2017 not giving me a fuzzy match result for a almost identical segment that was previously translated?

Question

Dear Studio 2017 users, 
 I was working on a project with lots of fuzzy matches against the project TM. However, I noticed that Studio does not seem to offer me a fuzzy result from the TM when it's supposed to. For example, a segment "No plasma" is in the project TM, but I didn't get a result in the translation results window when I was working on a new segment called "No Plasma". 
 I believe the client prepared this project using either Studio 2011 or 2014. I did upgrade the TM using ReindexTMs with both Re-Index and Uplift enabled. Are there other settings I can adjust that would make Studio 2017 recognize No Plasma as a fuzzy match from the TM segment No plasma? 
 Thank you so much for your advice! 
 Chunyi

Paul Filkin · Answer

Chunyi Chen said: Is there a way to be sure this change will apply in future projects not just this project? 
 Hi Chunyi, 
 You need to make this change to your Project Templates, if you are using them, or to your default template in File -> Options. Then all new projects will have the desired settings preconfigured. 
 Regards 
 Paul

Jerzy Czopik · Answer

This seems to be related to "Look ahead". 
2All involved here: please go to File -> Options -> Editor -> Automation and switch "Look Ahead" off. Then check, if Studio now behaves as expected.

Jerzy Czopik · Answer

Read the answer before: this is a result of the Look Ahead setting, which has been introduced with SDL Trados Studio 2017 SR1. In particular scenarios like the one you describe it is better to switch this new feature off.

Jerzy Czopik · Answer

Have you already tried to switch Look Ahead (File -> Options -> Editor -> Automation) off?

Lucia Vargas · Answer

Hi Jerzy, thank you so much, indeed, this worked perfectly. I now get the matches when they are suppossed to appear. I had been experiencing this a lot but I am glad I finally came here to ask. I wonder, though, what is the purpose of this Look Ahead function in Trados? I will make some research later, thanks! 
 
I hope Chunyi had also solved the issue as well.

Paul Filkin · Answer

Hi Lucia Vargas , 
 
The idea behind the Look Ahead function is to increase the look up performance and reduce any lag, in particular when working interactively with machine translation. So the idea is that Studio looks ahead at what is about to be translated and fetches the results in advance of you getting there. These results are cached and are immediately available when you enter the next few segments. 
 
The drawback of this approach is that new information in your translation memory from the previous segment won't be available to you, and this can also affect your terminology. I know the development team are looking at ways to reduce this drawback since the idea itself is actually very helpful. 
 
Regards

Paul Filkin · Answer

Ignacio Niveiro 
 All I can tell you is that the development team are aware of the problems. I don't know when we can expect a solution to problem in an update.

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Why is Studio 2017 not giving me a fuzzy match result for a almost identical segment that was previously translated?