Want to have it fixed…give us a try to help you.
That means:
Exporting and importing to another device can lead to errors…the hardware is not the same. Before importing you have to check the config manually.
May I ask why? Just curious what you are missing.
What I don’t understand is why, after all the times we have mentioned this, there still is not a published table of differences between v6 and v7
including the status (will not be fixed, will be fixed in v7.xx, will be fixed but still unknown when).
Dear All,
I have an issue at hand and i will wholeheartedly cherish a specific response addressing the issue and no story please.
The issue is that i purchased about 10 units of ccr2116 with v7.8 already on the device but most of my active ccr1036 are on v6.49.7 and am changing about 10 units of the ccr1036 to ccr2116 and i desire to downgrade the v7.8 on the ccr2116 to v6.49.7.but several efforts of downgrading the ccr2116 with v7.8 to v6.49.7 proved abortive and not yielding results. Can someone guide on how the downgrading can possibly be done?
No Mikrotik device can be downgraded lower than factory software version. No way around it.
Sometimes this limit is superficial, but sometimes it’s very real. E.g. v6 doesn’t contain device drivers for ax wireless cards (and likely for SoCs and switch chips as well). Some device families got newer hardware revision (which is not wildly publicized, but it’s possible to find out if your devices are of different revisions) which again requires certain support in ROS.
As @mkx has written already what you want is not possible. Therefore the only way forward for you if you want to stay with MikroTik is back to the school and learn v7. Start with: Upgrading to v7 part of the documentation and follow the reading with Moving from ROSv6 to v7 with examples than go trough the rest of the documentation (including examples) with a fine comb.
Also you may want to read relevant parts of the forums that might prove useful in adapting v7, such as: How to: Edge router and BNG optimization for ISPs.
Also @rextended described the process of how to get rough guide to configure your new CCR2116s to which I would only add that for obvious reasons replace 7.7 with 7.13.1 wherever it is in that guide.
One of the problems is that there is no offline converter for configurations from v6 to v7.
When you have existing hardware running v6 you can upgrade that and it will mostly convert the configuration, but when you have bought a shiny new CCR2116 that can only run v7 you cannot paste the export of a router running v6 in there and have it converted for you.
Sometimes it is possible to do it in a CHR, but it is an extra hoop to jump through.
Would be nice when there was an item on mikrotik.com where you could upload your export.rsc or supout.rif, have it converted to v7 and then download the v7.rsc that can be used on a new device.
So, actually must be “If I had to migrate from CCR1036 v6.49.10 to CCR2112 v7.13.1…” 
rextended is correct and Normands/MT are lazy and incompetent. Even TP LINK has different firmware for different hardware versions.