@SetTargetFrame doesn't work

Since we migrate an application 6.5 to 8.5.1@SetTargetFrame doesn’t work when we call it to open information.

Here the code:

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@SetTargetFrame(“FR_bottom”);

@URLOpen(“Notes://” + Server + “/” + Chemin + “/” + Base + “/” + NomFrameSet + “?OpenFrameSet”);

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The link are good because we open the good frameset (good informations) … but it is open on a second windows instead of FR_Bottom frameset.

any clues?

Thanks in advance