But interestingly putting the shared function on the button callback works!

I will check it in the daws and let's see if that one crashes or not. Thank you so much @d-healey for this brillant idea and help.

HiseSnippet 1379.3oc6Y0saaaCEVx1bK1ctncHCXWJDrKb.xBrz5OanXHNw+TXz5Di3rzsaVGiDcLQjHEjnxpQQeP5c8QIOB6QXOB6MXijR1hxU1w0KsXIK5BEyygGxuyGO7viX5GPsQggz.M8xGM1Goo+EfAiIrQMGAwDstszzuKnGLjgBLhEs2XeXXHxQSWu3SEBzKWRS97W6rGzERrQohzzNlhsQOG6gYoR623YXW2NPGzQXOkd+fFcsojlTWZDGOEA007g1mAOEsOTzsB.M8OqsClQCFvfLTnldo8nNiGLh96j39eLNDehKRzvTa.efhE2g55HPrPpVyQXWm9S76PMMcP+TVnXLKrNnG1AOUdJabOoBiTKT4C8BKBdlpvq9xCOcE3UJFd2GLvN.6yR0Hv1c.cI7EpgP9RfJrh6qVg1.PSJuGD11dvyPcB3MlZQsGUu9VFOrd8MeR0JUqvWHBYFmCCLFf87cQhkZSiezPFbr8oHV6gCQ1rZanndCgo4Yn0hMzZi34T038hXLpbFm.YtoMod9TBuQsMRzmXIl3hIHigQDaFlRLnjD8BiCnt0rmX4V7Q2MBsY0JutZEC9CdnQsIhJKD7LB8DqsCQriERqIZZJl73laJlPY+x9mvQv.jSmD.TKFVuQ99Rb.wTk.ylPW2S3g70lE+S3mrbjDZykgjZmK+H0d4ri5aASk.KU9HeZKdbdxkRRKhhR7f7IHUGX9zi0BoGqEROVW0ziYNzCW8JvJVKhUrdOVYV+a1Ybp+nrYVL96xXA3ShXnZpJDu2xHu8EYGBq4MDVJCgUNCA2+qVQYwXeJCc.GlUdckxUdSEiYUMbXt5RnAWTPtpEm8DrHCqQh7NAELYQeRG4IgylkGL+r7pGBYGuZpzQJoKAyNvGQlWtesjP.9o.ESPE+WL4Y.2M4LfAtXGTfFlmp+yAxUEMIfSNW8cu8s+vEZKswVe.FGGsKMtLHIzOi4xhBz9otsfLn3frDug6g9n.FVPd5sPmyqPH9XsxfVnvyXTeo6lDwyQ1k5vuJcBebiwoM1qgmZEJ+xEdvWoVchG1wwE0mFhEK8oZ5Jb5kd9sTm+gpy+NWIyeokf1SG1K9UED7teqg16W9.uHFpSjKjksxFwtxDEBznVBgnLABGkiUWY+nTtyxB26C5iY1ixGuExAu7.vO13Mo3wpf3ZbRAaIPme9psRw54UoXAErr1zx4ml2UBkpJBLmW07WH122B4Byveu.6vFoDM2Hm586RNmu0tO0EFLK6WLqKWb4RaliaVZoCQDtjw0lP5uDHo7qS.VFRb8Av2CzG9eg.hCoQLL4zdPdwQ7L2f8i7Fv+nWaDGpDBxUTUgdAw4+wsqKZK.z.DwQ13u4OIJMEs0STZNQo1GXt.qayEbatfayEbiOWv5wTxc.u.dNRdoLR13qjsGRC7LdJhfBDbk4Btru+XYurO+k9x9NvlwgvQAPRnOMDYpNxynyRUWKDKhjs6whxzKg60g6dJ8asFSDZoJjGVjYv3syLR8vJ0v+m6zl.4K5CPbuw4fPatyJ3N03l9QtgH4tCSUCSEaoJd1bikVtbiWquiyOceiRwkCtWx0vVdBFiO+rM+fNW92zNMy8PXjKahzrai5QIT+QTB1VMl5PDe2+omhxD2jqCsKiAsOKUx5MND4hfgJas9lFOGSPv.NOgVQtvb44hEsd80fX3ZH16aby3aKKdi+aK+2sCkmd7+Imp9oXN7f1AzWZGeCbhsdqIkv8ah7eJVYPOQaioW7F.Te65hKVB+RaaQzw2x4m7swZEr46VAadvJXyCWAadzJXyiWAa99EZi3ryciXTu33etf9skW.ptdboBxsBZ+CzbgkiO

@d-healey after clicking the Link button, the Knob2 value has been updating but Simple Gain value is not being updated. You can check that.

@d-healey said in Linking knobs causes DAW crash for multiple instances!:

@Fortune I wouldn't have thought so, because the shared function should trigger whether or not the knobs are linked, hover if you only want it to trigger when the knobs are linked you could just wrap the call in the button check we already have in the knob callbacks.

Tasks that are only done by one knob should go in that knob's callback rather than the shared function.

So we are back to start again, right? shared function is not working, .changed() is crashing for multiple instances. I also saw lot's of suggestions for using .changed() for linking knobs on forum.

Actually it is avery simple process, link/unlink knobs with a button, any ideas anyone?

@d-healey Is button check needed in shared function?

@d-healey Thank you sir. Let's say each knob controls a simple gain. The simple gain value is not updated. In this situation what should be inside the shared function?

HiseSnippet 1412.3oc6Y0saaaCEVx1rK1YtncnEaWJDrKb.5Rsz5OCnaHNINtyn0IFwYoa2rVFIpXhHQZHQkUih9fz61iRdD1ivdD1avFIkrEkqrii2RVSP7EEkmCOjemuygGdDS2.pMJLjFnoWd+gCPZ5eNn2PBq+V8gXhV6lZ52FzAFxPAFwh1b3.XXHxQSWu3yEBzKWRS96uVeSnGjXiREooc.EaidI1GyRk1swKvddsfNn8w9Jy9QMZaSIaQ8nQb7TDTWa.z9X3QncfhoU.noeqscvLZPOFjgB0zKsI0YXu9zeiDO+Cvg3C8PhAlZ83KTr3VTOGAhER01pO1yo6H+NTSSGzMkEJFyB2CzA6fGKOkMtiTgQpEp7gdgYAOSU3Ue9gmtB7JECu6B5YGfGvR0Hv1xf1DdfxExCApvJdtZEVF.1hxmAgslO7XTq.9fwVT6I0q+.iGWu9pOqZkpU3AhPlwIv.idX+AdHQn1z3GLjIGqcDhssqKxlUaEE0qHLMOCslsgVqDumpFuYDiQk63HHyMcKp+.JgOn1JI5SrDS7vDjgaDwlgoDCJIQuv3.pWM6QV9.9p6EgVsZk2UshA+G10n1HQkEBdAgdn0ZgH1ABo0DCMEad7vUEa36ka5Y.LwRjr8aA87NjmJWaRbMxuy56xsbpdtT6T8ao1y1qUhZBbtAiEfOLhgpopP7uir7Yw1kxYINhJyjOAN19xwKP4v9v.jSqDLW6rHzD+Me5T0cmNYZMSxzZljo04gLslFYZ8ugLMygLWLdzZV7n0GwiSxHStiiYfG9vlTiPVjqqQeT.xf0Gx3noZEExbGJCsK2nJuqR4JuuhwjpbcyUWBn7PA4pVbCRvrLrFIx+PTvHpezD4kRyVqFL8Z0pWkXGysJSjRZSvrcGfHSqBtVR.gWKuXBp3+OlrR9sSpj2yC6fBzv7B1eFPFz0j.N41we+CeX8S0laisNGFGm6IMtLHIQLi4xq109o1MgLn35nDug6gCPALrf7zahNgeOe7kSkAMQgGynCjtaR9GGYmoC+1zM7oMFlNXyF9p8Y7Km5CeqZOF9XGGOTWZHVD5S0zV3zy89aot+tp6+5+mr+klCZOcYO8WUPvouog1G2D.uUDpSjGjks+DQglDEBzn1Hf3xdBGkCUirWHMsLuv8tftXlc+7wagbvKOA7hFuIs.VED2oRJXKAZ8yKZ+d42NZ8752qfBVVZbS4iuJQBkpJBLmVO4xy8MQdvL72qvNr9JYyMxoq81jS3Gs6R8fASx9Ey5xEmOWNG2rzbmhHbIiqLozeAPR4Wk.rLk3pCfuCnK7SgDh8nQLL4nNPd+d7J2fch76w+zUaDGpDBxSzUgdAw8+wiqKFK.TODwQN3u4+RTZJFqmnzbjRsyYs.qoUK3Mtte+M0BtoVvM0BtVTK39wTxxfWAOAIeZEIabe4XWZfuwyQDTffqLmwS18Gy6S1MXtextcsYbHre.jDNfFhLUW4IzYopqIhEQxN8XQYlkv8ZwcOk4sTiQBsTExSKxrX7wYVoNXkd3+y02l.4A8dHt23ranM2YEbmZdS2HuPj7zgopgohsTE+iv.GdbwdV0KO2sKl6yCdqOoe8xKuuao37A2y3AVKOBiw2otM+xOO924NtZtKLxiMRZ1iVcnD5f9TBNSPeODuhvQGgxjKkqCsAiAsONUx8ZrGxCACUNt80MdIlffAbdBsfbg47yEyJd8UfX3ZHpGXb836MKdM56MuHNgxKYd0IR+k.dYbKCY313++38kQ+AWF6gOzNf9Z632RTTvXIoDteSj+Q5JC5HFaL9IDAf5qUW7DY3WaaKxo+FN+juMVKfMe6BXyiV.ad7BXySV.ad5BXy2MSaD23uQDi5Gm+yEzca4S4pqG2zi7nf1+XM8OrD

@d-healey Thank you. I am really really so confused. Would you mind sharing a simple example from my snippet please.

@d-healey Thanks. But actually I couldn't find a way to link-unlink knobs with this shared function.

HiseSnippet 1411.3oc6Y0saaaCEVJ1pq1ctncnEaWJDrKbA5Brz5OCqXHt4uNi1zXT2ktcy5XjniIBEogDUVCJ56VdD1ivdD106lsCojrnbTTT8ZZWJpbfg44vC424iGd3QLCC4d3nHdngYqmezTrg4maM5HlXx5SPDlwfMLLup01nHANzNQzZGMEEEg8MLMa7Ho.yVMMTO+0pqgnHlGNWjgwtbhG9Ij.hHW5v9OlPoag7wOmDn066zefGmsNmxiA7zvpmwTj2An8wOEI61RVFlWZSehfGNRfD3HCylqw8OZzD9uyR5+tjHxdTrrgiwHXfRDuEm5KQr72FqOgP8Gl42QFFlVCyYgFIrvMr1l3SlIOmMtlRgctE57g4RUAOmyFdNkAOSM30LAdW2ZjWHYpHWiDaWwZ.CVnFifk.cXkzWik96lVqygdvDqDfN.uUHzXlEcuWud219t85cqGzocm1vBQjv9PTn8HRvTJVtT6X+C1pfiU1GK1b7Xrmn6xZpWVZZYF5VsgtyY3SHrCd4ZwBAmAFlAYvz04AS4LnQ2k05yxIHN4S9n7XFeOmS0dk1TKILJggsGGy7DDXN4LkVoggbZWuLqtMLtzX7s5z90cZaCOIeqw.qDgEOTHBI6EKvc0UH+Ny9GjYcK473JMZWohtyT2JZBJD6uUJh5Jk8FEVqzajiTJpWGQo6A6d5VzYxnphzjakzjakzj6YSSZqzmFA4VAA47NhfbqhfbmifNoypEwUsK2hx8PToDfVSbf8yb.E1U+IcPxX6tZCqV2fQpUJ6k8bxXE0f8FIZqx0KrSobB3jtV9Vp4Ih4IdkKm3TseiFc8Tt.uCnu8qkJZaOupwiKUW57SwgkpVdfQXUF1kEGrGNLaAIqiPlyholspWpYuDJUqib1.FQryTL6zRXajtN.otajhJ3WBUh6qll3dDk3iCMHP94OyREiXn.b9gge+wF01X22BiSVlUF2wRage9g.d9oAafDH4IPodD3kSwgBhj.M2.eHbzdx4Qsr1.GcffOU4xogd.5NSm9U4S386eTdi05GnWZwubb.5U5XKf36SwC4QD4xetlARGu1yuq97OVe9W8cx72rlTe9Pe7upghi+s9Fm7renBDteLEIJVVhL+YpBIhzO+WdFOCP5Q50p8VTqRuZWqRcg60sFRDdSJGuKUBdgfvya7lV4WGqjBTxAaSqs942sk4UZUnKogkKOqV7YmPpfRGMANmVo31x8+afonB72KH9hIZQz8KoX8ArCgs2C4TT37reihtbi54xk3lMqcHhzkruvDR+EVJJ+hDfUgDWb.70rFh9+P.wy3wBBa+sQPYrPlaqmFGLBdiUOL.UFCSkUWXtjrNfj18jsk.ZDl4qZ7OvSpRGYayTkNYJMdKyE39obAeJWvmxE7QetfalPIWw5EnCwpaTQwF2T0dLOLv9QXFNTxUNUbSc+Qcuoto09l51wS.P34gHVzTdD1QejmSmqttMvhXVwtmHpPujt2Vf6o0uK2OSnqtPHrnvfAsKLRaSzpi+OWcSFBVzGgAuwemHOvYkbmdbyvXZDVs6vQ2vbwt5h+QTnOrt3UU9xZVtXwB505eIIRuzGfav77XS8+0WhoQ8f6YbIqsxvXxAraBmDRgW7cVp8wnXpHSZw8YayY7oS3LRgHfmggzC6uOtPfUoNzCEBj2A4RtQ+mgoXTj1duutO7piXTHvS3EjKbpOWT050WYk.WaYxA6ONd4yFeD8xmmG6Pg7mWbVo+RKHmtqsZ419C+586ihEdeLGAHuP9K8RtfQYBiKqj.9MS8Opqk01x11ytSSKqdqzSdmYjW54Iio+FfeJ2F2EvlucAr4NKfM2cAr4dKfM2eAr46pzF4I9OLVvCRh+AAC2Tc2tllIU.o1JX7udKtC+C

@d-healey Yes I've just tried Check javascript objects for cyclic references tool and it doesn't recognize any cyclic reference.

But when I remove .changed() methods from .onR_GainControl. and .onl_GainControl, the value is not updated in the eq of the controlled knob. What is the proper way for this?

@d-healey said in Linking knobs causes DAW crash for multiple instances!:

Circular references. L changes R which changes L which changes R which changes L which changes R...

Do you mean the code is not correctly written?

@d-healey said in Linking knobs causes DAW crash for multiple instances!:

There's a tool in the Tools menu to check for these things.

Which tool?

Well, while debugging I found something is weird that might involve many people.

This plugin has a link button for linking L&R eq band gains, very simple code and works great when used about up to 5 - 7 instances. But when I increase the plugin usage to about 10, Cubase 9, Cubase 10 and Studio One 4 DAWs (these are the DAWs that I tested so far) crash in multiple plugin instances. Cubase says The thread tried to read from or write to a virtual address for which it does not have the appropriate access

But when I remove the link option and let the knobs operate individually, DAWs don't crash on multiple instances.

The code is very simple. Is there any abnormal thing in the code that might cause the issue?

PC Specs: Intel i9 10850K, 128 GB RAM, NVidia 2080Ti, 2 TB M.2 SSD - Windows 10.

const var Link_LR_MS_Units_Button = Content.getComponent("Link_LR_MS_Units_Button");

const var L_Gain = Content.getComponent("L_Gain");
const var R_Gain = Content.getComponent("R_Gain");





inline function onLink_LR_MS_Units_ButtonControl(component, value)
{
	local val = L_Gain.getValue();
	
	
    if (value)
	{
            R_Gain.setValue(val);
            R_Gain.changed();
	}
	
};

Content.getComponent("Link_LR_MS_Units_Button").setControlCallback(onLink_LR_MS_Units_ButtonControl);





inline function onL_GainControl(component, value)
{
    local index = LM_EQ.Gain  + 1 * LM_EQ.BandOffset;
	LM_EQ.setAttribute(index, value);
	
	
	if (Link_LR_MS_Units_Button.getValue())
	{
	    R_Gain.setValue(value);
	    R_Gain.changed();
	}	   	

};

Content.getComponent("L_Gain").setControlCallback(onL_GainControl);







inline function onR_GainControl(component, value)
{
    local index = RS_EQ.Gain  + 1 * RS_EQ.BandOffset;
	RS_EQ.setAttribute(index, value);
	
	
	if (Link_LR_MS_Units_Button.getValue())
	{
	    L_Gain.setValue(value);
	    L_Gain.changed();
	}	   	
	
	
};

Content.getComponent("R_Gain").setControlCallback(onR_GainControl);